51900357205557 has 48 divisors (see below), whose sum is σ = 88515437337600. Its totient is φ = 28676355091200.

The previous prime is 51900357205519. The next prime is 51900357205589. The reversal of 51900357205557 is 75550275300915.

51900357205557 is a `hidden beast` number, since 5 + 19 + 0 + 0 + 3 + 5 + 72 + 0 + 5 + 557 = 666.

It is not a de Polignac number, because 51900357205557 - 2⁶ = 51900357205493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51900357204557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8944432 + ... + 13557417.

It is an arithmetic number, because the mean of its divisors is an integer number (1844071611200).

Almost surely, 2^{51900357205557} is an apocalyptic number.

It is an amenable number.

51900357205557 is a deficient number, since it is larger than the sum of its proper divisors (36615080132043).

51900357205557 is a wasteful number, since it uses less digits than its factorization.

51900357205557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22503074 (or 22503071 counting only the distinct ones).

The product of its (nonzero) digits is 8268750, while the sum is 54.

The spelling of 51900357205557 in words is "fifty-one trillion, nine hundred billion, three hundred fifty-seven million, two hundred five thousand, five hundred fifty-seven".