51204662562816 has 520 divisors, whose sum is σ = 178880851199424. Its totient is φ = 14289645404160.

The previous prime is 51204662562799. The next prime is 51204662562821. The reversal of 51204662562816 is 61826526640215.

51204662562816 is a `hidden beast` number, since 5 + 1 + 2 + 0 + 4 + 6 + 6 + 2 + 5 + 628 + 1 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 99608206 + ... + 100120946.

Almost surely, 2^{51204662562816} is an apocalyptic number.

51204662562816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51204662562816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89440425599712).

51204662562816 is an abundant number, since it is smaller than the sum of its proper divisors (127676188636608).

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

51204662562816 is an equidigital number, since it uses as much as digits as its factorization.

51204662562816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512827 (or 512796 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 54.

The spelling of 51204662562816 in words is "fifty-one trillion, two hundred four billion, six hundred sixty-two million, five hundred sixty-two thousand, eight hundred sixteen".