56814661457 has 2 divisors, whose sum is σ = 56814661458. Its totient is φ = 56814661456.

The previous prime is 56814661447. The next prime is 56814661481. The reversal of 56814661457 is 75416641865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56302272961 + 512388496 = 237281^2 + 22636^2 .

It is a cyclic number.

It is not a de Polignac number, because 56814661457 - 2¹⁴ = 56814645073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56814661399 and 56814661408.

It is not a weakly prime, because it can be changed into another prime (56814661447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28407330728 + 28407330729.

It is an arithmetic number, because the mean of its divisors is an integer number (28407330729).

Almost surely, 2^56814661457 is an apocalyptic number.

It is an amenable number.

56814661457 is a deficient number, since it is larger than the sum of its proper divisors (1).

56814661457 is an equidigital number, since it uses as much as digits as its factorization.

56814661457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 53.

The spelling of 56814661457 in words is "fifty-six billion, eight hundred fourteen million, six hundred sixty-one thousand, four hundred fifty-seven".