56165635515 has 16 divisors (see below), whose sum is σ = 98034564096. Its totient is φ = 27231823200.

The previous prime is 56165635507. The next prime is 56165635543. The reversal of 56165635515 is 51553656165.

It is not a de Polignac number, because 56165635515 - 2³ = 56165635507 is a prime.

It is a super-2 number, since 2×56165635515² (a number of 22 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, 170198731 + ... + 170199060.

It is an arithmetic number, because the mean of its divisors is an integer number (6127160256).

Almost surely, 2^56165635515 is an apocalyptic number.

56165635515 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

56165635515 is a deficient number, since it is larger than the sum of its proper divisors (41868928581).

56165635515 is a wasteful number, since it uses less digits than its factorization.

56165635515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340397810.

The product of its digits is 2025000, while the sum is 48.

The spelling of 56165635515 in words is "fifty-six billion, one hundred sixty-five million, six hundred thirty-five thousand, five hundred fifteen".