2656313561 has 16 divisors (see below), whose sum is σ = 2948124480. Its totient is φ = 2373131520.

The previous prime is 2656313549. The next prime is 2656313567. The reversal of 2656313561 is 1653136562.

It is a cyclic number.

It is not a de Polignac number, because 2656313561 - 2⁶ = 2656313497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2656313567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 221405 + ... + 233093.

It is an arithmetic number, because the mean of its divisors is an integer number (184257780).

Almost surely, 2^2656313561 is an apocalyptic number.

It is an amenable number.

2656313561 is a deficient number, since it is larger than the sum of its proper divisors (291810919).

2656313561 is a wasteful number, since it uses less digits than its factorization.

2656313561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12056.

The product of its digits is 97200, while the sum is 38.

The square root of 2656313561 is about 51539.4369488065. The cubic root of 2656313561 is about 1384.9256105701.

The spelling of 2656313561 in words is "two billion, six hundred fifty-six million, three hundred thirteen thousand, five hundred sixty-one".