5656518815664 has 40 divisors (see below), whose sum is σ = 14724220750272. Its totient is φ = 1871113092160.

The previous prime is 5656518815641. The next prime is 5656518815699. The reversal of 5656518815664 is 4665188156565.

It is a super-2 number, since 2×5656518815664² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 5656518815595 and 5656518815604.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 449780514 + ... + 449793089.

Almost surely, 2^{5656518815664} is an apocalyptic number.

It is an amenable number.

5656518815664 is an abundant number, since it is smaller than the sum of its proper divisors (9067701934608).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5656518815664 is a wasteful number, since it uses less digits than its factorization.

5656518815664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 899573745 (or 899573739 counting only the distinct ones).

The product of its digits is 207360000, while the sum is 66.

The spelling of 5656518815664 in words is "five trillion, six hundred fifty-six billion, five hundred eighteen million, eight hundred fifteen thousand, six hundred sixty-four".