56022655721 has 2 divisors, whose sum is σ = 56022655722. Its totient is φ = 56022655720.

The previous prime is 56022655699. The next prime is 56022655727. The reversal of 56022655721 is 12755622065.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55253203600 + 769452121 = 235060^2 + 27739^2 .

It is a cyclic number.

It is not a de Polignac number, because 56022655721 - 2⁶ = 56022655657 is a prime.

It is not a weakly prime, because it can be changed into another prime (56022655727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28011327860 + 28011327861.

It is an arithmetic number, because the mean of its divisors is an integer number (28011327861).

Almost surely, 2^56022655721 is an apocalyptic number.

It is an amenable number.

56022655721 is a deficient number, since it is larger than the sum of its proper divisors (1).

56022655721 is an equidigital number, since it uses as much as digits as its factorization.

56022655721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252000, while the sum is 41.

The spelling of 56022655721 in words is "fifty-six billion, twenty-two million, six hundred fifty-five thousand, seven hundred twenty-one".