2656260081 has 64 divisors (see below), whose sum is σ = 4304275200. Its totient is φ = 1612182528.

The previous prime is 2656260073. The next prime is 2656260121. The reversal of 2656260081 is 1800626562.

2656260081 is a `hidden beast` number, since 26 + 5 + 626 + 0 + 0 + 8 + 1 = 666.

It is not a de Polignac number, because 2656260081 - 2³ = 2656260073 is a prime.

It is a super-2 number, since 2×2656260081² = 14111435235828253122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2656260001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3888766 + ... + 3889448.

It is an arithmetic number, because the mean of its divisors is an integer number (67254300).

Almost surely, 2^2656260081 is an apocalyptic number.

It is an amenable number.

2656260081 is a deficient number, since it is larger than the sum of its proper divisors (1648015119).

2656260081 is a wasteful number, since it uses less digits than its factorization.

2656260081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 969 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 2656260081 is about 51538.9181201934. The cubic root of 2656260081 is about 1384.9163161957.

The spelling of 2656260081 in words is "two billion, six hundred fifty-six million, two hundred sixty thousand, eighty-one".