2656001265631 has 32 divisors (see below), whose sum is σ = 3338449551360. Its totient is φ = 2062831714944.

The previous prime is 2656001265569. The next prime is 2656001265647. The reversal of 2656001265631 is 1365621006562.

It is not a de Polignac number, because 2656001265631 - 2²¹ = 2655999168479 is a prime.

It is a super-2 number, since 2×2656001265631² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656001265661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5119135 + ... + 5614048.

It is an arithmetic number, because the mean of its divisors is an integer number (104326548480).

Almost surely, 2^{2656001265631} is an apocalyptic number.

2656001265631 is a deficient number, since it is larger than the sum of its proper divisors (682448285729).

2656001265631 is a wasteful number, since it uses less digits than its factorization.

2656001265631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10733295.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 2656001265631 in words is "two trillion, six hundred fifty-six billion, one million, two hundred sixty-five thousand, six hundred thirty-one".