56864697641 has 2 divisors, whose sum is σ = 56864697642. Its totient is φ = 56864697640.

The previous prime is 56864697623. The next prime is 56864697661. The reversal of 56864697641 is 14679646865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56562633241 + 302064400 = 237829^2 + 17380^2 .

It is a cyclic number.

It is not a de Polignac number, because 56864697641 - 2¹⁴ = 56864681257 is a prime.

It is not a weakly prime, because it can be changed into another prime (56864697661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28432348820 + 28432348821.

It is an arithmetic number, because the mean of its divisors is an integer number (28432348821).

Almost surely, 2^56864697641 is an apocalyptic number.

It is an amenable number.

56864697641 is a deficient number, since it is larger than the sum of its proper divisors (1).

56864697641 is an equidigital number, since it uses as much as digits as its factorization.

56864697641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 62.

The spelling of 56864697641 in words is "fifty-six billion, eight hundred sixty-four million, six hundred ninety-seven thousand, six hundred forty-one".