42850242009 has 9 divisors (see below), whose sum is σ = 61895691039. Its totient is φ = 28566414000.

The previous prime is 42850241981. The next prime is 42850242031. The reversal of 42850242009 is 90024205824.

The square root of 42850242009 is 207003.

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

42850242009 is a `hidden beast` number, since 428 + 5 + 0 + 24 + 200 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 447195609 + 42403046400 = 21147^2 + 205920^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 42850242009 - 2²⁹ = 42313371097 is a prime.

It is a super-2 number, since 2×42850242009² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42850242209) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 586509 + ... + 655509.

Almost surely, 2^42850242009 is an apocalyptic number.

42850242009 is the 207003-rd square number.

42850242009 is the 103502-nd centered octagonal number.

It is an amenable number.

42850242009 is a deficient number, since it is larger than the sum of its proper divisors (19045449030).

42850242009 is an frugal number, since it uses more digits than its factorization.

42850242009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138008 (or 69004 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Multiplying 42850242009 by its sum of digits (36), we get a square (1542608712324 = 1242018²).

The spelling of 42850242009 in words is "forty-two billion, eight hundred fifty million, two hundred forty-two thousand, nine".