56695384621 has 2 divisors, whose sum is σ = 56695384622. Its totient is φ = 56695384620.

The previous prime is 56695384579. The next prime is 56695384637. The reversal of 56695384621 is 12648359665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51494955625 + 5200428996 = 226925^2 + 72114^2 .

It is a cyclic number.

It is not a de Polignac number, because 56695384621 - 2¹³ = 56695376429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56695384651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28347692310 + 28347692311.

It is an arithmetic number, because the mean of its divisors is an integer number (28347692311).

Almost surely, 2^56695384621 is an apocalyptic number.

It is an amenable number.

56695384621 is a deficient number, since it is larger than the sum of its proper divisors (1).

56695384621 is an equidigital number, since it uses as much as digits as its factorization.

56695384621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9331200, while the sum is 55.

The spelling of 56695384621 in words is "fifty-six billion, six hundred ninety-five million, three hundred eighty-four thousand, six hundred twenty-one".