57122772644 has 12 divisors (see below), whose sum is σ = 114245545344. Its totient is φ = 24481188264.

The previous prime is 57122772643. The next prime is 57122772659. The reversal of 57122772644 is 44627722175.

57122772644 is an admirable number.

It is a super-2 number, since 2×57122772644² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (57122772643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020049484 + ... + 1020049539.

It is an arithmetic number, because the mean of its divisors is an integer number (9520462112).

Almost surely, 2^57122772644 is an apocalyptic number.

It is an amenable number.

57122772644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

57122772644 is a wasteful number, since it uses less digits than its factorization.

57122772644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2040099034 (or 2040099032 counting only the distinct ones).

The product of its digits is 1317120, while the sum is 47.

The spelling of 57122772644 in words is "fifty-seven billion, one hundred twenty-two million, seven hundred seventy-two thousand, six hundred forty-four".