2656111813 has 2 divisors, whose sum is σ = 2656111814. Its totient is φ = 2656111812.

The previous prime is 2656111793. The next prime is 2656111819. The reversal of 2656111813 is 3181116562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2348565444 + 307546369 = 48462^2 + 17537^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656111813 - 2⁵ = 2656111781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656111819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328055906 + 1328055907.

It is an arithmetic number, because the mean of its divisors is an integer number (1328055907).

Almost surely, 2^2656111813 is an apocalyptic number.

It is an amenable number.

2656111813 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656111813 is an equidigital number, since it uses as much as digits as its factorization.

2656111813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 34.

The square root of 2656111813 is about 51537.4796919679. The cubic root of 2656111813 is about 1384.8905478112.

The spelling of 2656111813 in words is "two billion, six hundred fifty-six million, one hundred eleven thousand, eight hundred thirteen".