57117120720 has 120 divisors (see below), whose sum is σ = 194623147488. Its totient is φ = 13846567680.

The previous prime is 57117120677. The next prime is 57117120757. The reversal of 57117120720 is 2702171175.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 954382 + ... + 1012461.

Almost surely, 2^57117120720 is an apocalyptic number.

It is an amenable number.

57117120720 is an abundant number, since it is smaller than the sum of its proper divisors (137506026768).

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

57117120720 is a wasteful number, since it uses less digits than its factorization.

57117120720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966881 (or 1966864 counting only the distinct ones).

The product of its (nonzero) digits is 6860, while the sum is 33.

Adding to 57117120720 its reverse (2702171175), we get a palindrome (59819291895).

The spelling of 57117120720 in words is "fifty-seven billion, one hundred seventeen million, one hundred twenty thousand, seven hundred twenty".