2656161637 has 2 divisors, whose sum is σ = 2656161638. Its totient is φ = 2656161636.

The previous prime is 2656161559. The next prime is 2656161659. The reversal of 2656161637 is 7361616562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2651117121 + 5044516 = 51489^2 + 2246^2 .

It is a cyclic number.

It is not a de Polignac number, because 2656161637 - 2³¹ = 508677989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2656161593 and 2656161602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2656161667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1328080818 + 1328080819.

It is an arithmetic number, because the mean of its divisors is an integer number (1328080819).

Almost surely, 2^2656161637 is an apocalyptic number.

It is an amenable number.

2656161637 is a deficient number, since it is larger than the sum of its proper divisors (1).

2656161637 is an equidigital number, since it uses as much as digits as its factorization.

2656161637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 43.

The square root of 2656161637 is about 51537.9630660739. The cubic root of 2656161637 is about 1384.8992071298.

The spelling of 2656161637 in words is "two billion, six hundred fifty-six million, one hundred sixty-one thousand, six hundred thirty-seven".