57121510660765 has 32 divisors (see below), whose sum is σ = 72187946910720. Its totient is φ = 43271421963264.

The previous prime is 57121510660751. The next prime is 57121510660777. The reversal of 57121510660765 is 56706601512175.

It is a cyclic number.

It is not a de Polignac number, because 57121510660765 - 2⁷ = 57121510660637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1949724597 + ... + 1949753893.

It is an arithmetic number, because the mean of its divisors is an integer number (2255873340960).

Almost surely, 2^{57121510660765} is an apocalyptic number.

It is an amenable number.

57121510660765 is a deficient number, since it is larger than the sum of its proper divisors (15066436249955).

57121510660765 is a wasteful number, since it uses less digits than its factorization.

57121510660765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38421.

The product of its (nonzero) digits is 2646000, while the sum is 52.

The spelling of 57121510660765 in words is "fifty-seven trillion, one hundred twenty-one billion, five hundred ten million, six hundred sixty thousand, seven hundred sixty-five".