57855672020720 has 80 divisors (see below), whose sum is σ = 153837619476480. Its totient is φ = 19822445398272.

The previous prime is 57855672020717. The next prime is 57855672020737. The reversal of 57855672020720 is 2702027655875.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35091902 + ... + 36703581.

It is an arithmetic number, because the mean of its divisors is an integer number (1922970243456).

Almost surely, 2^{57855672020720} is an apocalyptic number.

It is an amenable number.

57855672020720 is an abundant number, since it is smaller than the sum of its proper divisors (95981947455760).

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

57855672020720 is a wasteful number, since it uses less digits than its factorization.

57855672020720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71796942 (or 71796936 counting only the distinct ones).

The product of its (nonzero) digits is 16464000, while the sum is 56.

The spelling of 57855672020720 in words is "fifty-seven trillion, eight hundred fifty-five billion, six hundred seventy-two million, twenty thousand, seven hundred twenty".