Search a number
-
+
8042642081 = 17503993887
BaseRepresentation
bin1110111110110000…
…01111101010100001
3202202111122112211122
413133120033222201
5112432404021311
63410021422025
7403206221045
oct73730175241
922674575748
108042642081
113457953041
12168556a915
139b2323416
14564208025
153211200db
hex1df60faa1

8042642081 has 8 divisors (see below), whose sum is σ = 8517519360. Its totient is φ = 7567962688.

The previous prime is 8042642059. The next prime is 8042642087. The reversal of 8042642081 is 1802462408.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 8042642081 - 214 = 8042625697 is a prime.

It is a super-2 number, since 2×80426420812 (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8042642087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38720 + ... + 132606.

It is an arithmetic number, because the mean of its divisors is an integer number (1064689920).

Almost surely, 28042642081 is an apocalyptic number.

It is an amenable number.

8042642081 is a deficient number, since it is larger than the sum of its proper divisors (474877279).

8042642081 is a wasteful number, since it uses less digits than its factorization.

8042642081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98943.

The product of its (nonzero) digits is 24576, while the sum is 35.

The square root of 8042642081 is about 89680.7787711503. The cubic root of 8042642081 is about 2003.5472116752.

The spelling of 8042642081 in words is "eight billion, forty-two million, six hundred forty-two thousand, eighty-one".

Divisors: 1 17 5039 85663 93887 1596079 473096593 8042642081