51912557798400 has 396 divisors, whose sum is σ = 200169336735732. Its totient is φ = 12778475028480.

The previous prime is 51912557798393. The next prime is 51912557798461. The reversal of 51912557798400 is 489775521915.

51912557798400 is a `hidden beast` number, since 5 + 1 + 9 + 1 + 2 + 557 + 79 + 8 + 4 + 0 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 4571112416256 + 47341445382144 = 2138016^2 + 6880512^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5670759 + ... + 11661158.

Almost surely, 2^{51912557798400} is an apocalyptic number.

51912557798400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

51912557798400 is an abundant number, since it is smaller than the sum of its proper divisors (148256778937332).

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

51912557798400 is a wasteful number, since it uses less digits than its factorization.

51912557798400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17331966 (or 17331940 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 63.

The spelling of 51912557798400 in words is "fifty-one trillion, nine hundred twelve billion, five hundred fifty-seven million, seven hundred ninety-eight thousand, four hundred".