2656786813864 has 64 divisors (see below), whose sum is σ = 5206528419840. Its totient is φ = 1268568987840.

The previous prime is 2656786813831. The next prime is 2656786813871. The reversal of 2656786813864 is 4683186876562.

It is a happy number.

It is a super-2 number, since 2×2656786813864² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (70) 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 = 2656786813793 and 2656786813802.

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, 569756797 + ... + 569761459.

It is an arithmetic number, because the mean of its divisors is an integer number (81352006560).

Almost surely, 2^{2656786813864} is an apocalyptic number.

It is an amenable number.

2656786813864 is a deficient number, since it is larger than the sum of its proper divisors (2549741605976).

2656786813864 is a wasteful number, since it uses less digits than its factorization.

2656786813864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9070 (or 9066 counting only the distinct ones).

The product of its digits is 557383680, while the sum is 70.

The spelling of 2656786813864 in words is "two trillion, six hundred fifty-six billion, seven hundred eighty-six million, eight hundred thirteen thousand, eight hundred sixty-four".