57222768402 has 18 divisors (see below), whose sum is σ = 123984863847. Its totient is φ = 19073917836.

The previous prime is 57222768401. The next prime is 57222768403. The reversal of 57222768402 is 20486722275.

57222768402 is a `hidden beast` number, since 572 + 2 + 2 + 76 + 8 + 4 + 0 + 2 = 666.

57222768402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (57222768401) and next prime (57222768403).

It can be written as a sum of positive squares in only one way, i.e., 28611384201 + 28611384201 = 169149^2 + 169149^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=169149.

It is not an unprimeable number, because it can be changed into a prime (57222768401) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 986703 + ... + 1043085.

Almost surely, 2^57222768402 is an apocalyptic number.

57222768402 is an abundant number, since it is smaller than the sum of its proper divisors (66762095445).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57222768402 is an frugal number, since it uses more digits than its factorization.

57222768402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112774 (or 56388 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The spelling of 57222768402 in words is "fifty-seven billion, two hundred twenty-two million, seven hundred sixty-eight thousand, four hundred two".