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4042543561 = 723122932
BaseRepresentation
bin1111000011110100…
…0101000111001001
3101102201202111020121
43300331011013021
531234342343221
61505045423241
7202115024200
oct36075050711
911381674217
104042543561
111794a018a1
12949a0ab21
134c5698c14
142a4c6a237
15189d7aa41
hexf0f451c9

4042543561 has 27 divisors (see below), whose sum is σ = 4875779943. Its totient is φ = 3341817360.

The previous prime is 4042543513. The next prime is 4042543591. The reversal of 4042543561 is 1653452404.

The square root of 4042543561 is 63581.

It is a perfect power (a square), and thus also a powerful number.

4042543561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3824804025 + 217739536 = 61845^2 + 14756^2 .

It is not a de Polignac number, because 4042543561 - 27 = 4042543433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4042543591) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13796931 + ... + 13797223.

Almost surely, 24042543561 is an apocalyptic number.

4042543561 is the 63581-st square number.

4042543561 is the 31791-st centered octagonal number.

It is an amenable number.

4042543561 is a deficient number, since it is larger than the sum of its proper divisors (833236382).

4042543561 is an frugal number, since it uses more digits than its factorization.

4042543561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The cubic root of 4042543561 is about 1593.0090245749.

Multiplying 4042543561 by its product of nonzero digits (57600), we get a square (232850509113600 = 152594402).

Adding to 4042543561 its reverse (1653452404), we get a palindrome (5695995965).

The spelling of 4042543561 in words is "four billion, forty-two million, five hundred forty-three thousand, five hundred sixty-one".

Divisors: 1 7 31 49 217 293 961 1519 2051 6727 9083 14357 47089 63581 85849 281573 445067 600943 1971011 2661319 4206601 13797077 18629233 82500889 130404631 577506223 4042543561