56689898665 has 16 divisors (see below), whose sum is σ = 68840593920. Its totient is φ = 44811624960.

The previous prime is 56689898653. The next prime is 56689898687.

56689898665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56689898665 - 2⁵ = 56689898633 is a prime.

It is a super-2 number, since 2×56689898665² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 56689898591 and 56689898600.

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, 205800 + ... + 394630.

It is an arithmetic number, because the mean of its divisors is an integer number (4302537120).

Almost surely, 2^56689898665 is an apocalyptic number.

It is an amenable number.

56689898665 is a deficient number, since it is larger than the sum of its proper divisors (12150695255).

56689898665 is a wasteful number, since it uses less digits than its factorization.

56689898665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189552.

The product of its digits is 1343692800, while the sum is 76.

The spelling of 56689898665 in words is "fifty-six billion, six hundred eighty-nine million, eight hundred ninety-eight thousand, six hundred sixty-five".