56649894665 has 32 divisors (see below), whose sum is σ = 88589168640. Its totient is φ = 33748245504.

The previous prime is 56649894641. The next prime is 56649894683.

56649894665 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 56649894665 - 2¹² = 56649890569 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56649894595 and 56649894604.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3654185 + ... + 3669654.

It is an arithmetic number, because the mean of its divisors is an integer number (2768411520).

Almost surely, 2^56649894665 is an apocalyptic number.

It is an amenable number.

56649894665 is a deficient number, since it is larger than the sum of its proper divisors (31939273975).

56649894665 is a wasteful number, since it uses less digits than its factorization.

56649894665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7323881.

The product of its digits is 335923200, while the sum is 68.

The spelling of 56649894665 in words is "fifty-six billion, six hundred forty-nine million, eight hundred ninety-four thousand, six hundred sixty-five".