56701551637 has 2 divisors, whose sum is σ = 56701551638. Its totient is φ = 56701551636.

The previous prime is 56701551587. The next prime is 56701551649. The reversal of 56701551637 is 73615510765.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41434230916 + 15267320721 = 203554^2 + 123561^2 .

It is a cyclic number.

It is not a de Polignac number, because 56701551637 - 2¹¹ = 56701549589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56701551677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28350775818 + 28350775819.

It is an arithmetic number, because the mean of its divisors is an integer number (28350775819).

Almost surely, 2^56701551637 is an apocalyptic number.

It is an amenable number.

56701551637 is a deficient number, since it is larger than the sum of its proper divisors (1).

56701551637 is an equidigital number, since it uses as much as digits as its factorization.

56701551637 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 661500, while the sum is 46.

The spelling of 56701551637 in words is "fifty-six billion, seven hundred one million, five hundred fifty-one thousand, six hundred thirty-seven".