57721412655 has 24 divisors (see below), whose sum is σ = 105935770512. Its totient is φ = 28973885184.

The previous prime is 57721412611. The next prime is 57721412657. The reversal of 57721412655 is 55621412775.

57721412655 is a `hidden beast` number, since 577 + 2 + 1 + 4 + 1 + 26 + 55 = 666.

It is not a de Polignac number, because 57721412655 - 2⁶ = 57721412591 is a prime.

It is a super-2 number, since 2×57721412655² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 57721412655.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57721412657) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37725649 + ... + 37727178.

It is an arithmetic number, because the mean of its divisors is an integer number (4413990438).

Almost surely, 2^57721412655 is an apocalyptic number.

57721412655 is a deficient number, since it is larger than the sum of its proper divisors (48214357857).

57721412655 is a wasteful number, since it uses less digits than its factorization.

57721412655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75452855 (or 75452852 counting only the distinct ones).

The product of its digits is 588000, while the sum is 45.

The spelling of 57721412655 in words is "fifty-seven billion, seven hundred twenty-one million, four hundred twelve thousand, six hundred fifty-five".