2656260130581 has 24 divisors (see below), whose sum is σ = 3851043199640. Its totient is φ = 1764276857856.

The previous prime is 2656260130567. The next prime is 2656260130583. The reversal of 2656260130581 is 1850310626562.

2656260130581 is a `hidden beast` number, since 2 + 6 + 5 + 6 + 2 + 60 + 1 + 3 + 0 + 581 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 180829908081 + 2475430222500 = 425241^2 + 1573350^2 .

It is not a de Polignac number, because 2656260130581 - 2²² = 2656255936277 is a prime.

It is a super-2 number, since 2×2656260130581² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656260130583) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29095101 + ... + 29186253.

Almost surely, 2^{2656260130581} is an apocalyptic number.

It is an amenable number.

2656260130581 is a deficient number, since it is larger than the sum of its proper divisors (1194783069059).

2656260130581 is a wasteful number, since it uses less digits than its factorization.

2656260130581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103125 (or 103122 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The spelling of 2656260130581 in words is "two trillion, six hundred fifty-six billion, two hundred sixty million, one hundred thirty thousand, five hundred eighty-one".