15056561065 has 16 divisors (see below), whose sum is σ = 22237383168. Its totient is φ = 9530306496.

The previous prime is 15056561059. The next prime is 15056561081. The reversal of 15056561065 is 56016565051.

It is a cyclic number.

It is not a de Polignac number, because 15056561065 - 2³ = 15056561057 is a prime.

It is a super-2 number, since 2×15056561065² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16545217 + ... + 16546126.

It is an arithmetic number, because the mean of its divisors is an integer number (1389836448).

Almost surely, 2^15056561065 is an apocalyptic number.

It is an amenable number.

15056561065 is a deficient number, since it is larger than the sum of its proper divisors (7180822103).

15056561065 is a wasteful number, since it uses less digits than its factorization.

15056561065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33091368.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 15056561065 in words is "fifteen billion, fifty-six million, five hundred sixty-one thousand, sixty-five".