2656886161 has 2 divisors, whose sum is σ = 2656886162. Its totient is φ = 2656886160.

The previous prime is 2656886153. The next prime is 2656886179. The reversal of 2656886161 is 1616886562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2359530625 + 297355536 = 48575^2 + 17244^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656886161 - 2³ = 2656886153 is a prime.

It is not a weakly prime, because it can be changed into another prime (2656887161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328443080 + 1328443081.

It is an arithmetic number, because the mean of its divisors is an integer number (1328443081).

Almost surely, 2^2656886161 is an apocalyptic number.

It is an amenable number.

2656886161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656886161 is an equidigital number, since it uses as much as digits as its factorization.

2656886161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 49.

The square root of 2656886161 is about 51544.9916189730. The cubic root of 2656886161 is about 1385.0251158196.

The spelling of 2656886161 in words is "two billion, six hundred fifty-six million, eight hundred eighty-six thousand, one hundred sixty-one".