51203979104256 has 364 divisors, whose sum is σ = 167479695551520. Its totient is φ = 15516347351040.

The previous prime is 51203979104233. The next prime is 51203979104269. The reversal of 51203979104256 is 65240197930215.

51203979104256 is a `hidden beast` number, since 5 + 1 + 203 + 9 + 7 + 9 + 1 + 0 + 425 + 6 = 666.

It is a super-2 number, since 2×51203979104256² (a number of 28 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 32066365 + ... + 33625283.

Almost surely, 2^{51203979104256} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51203979104256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83739847775760).

51203979104256 is an abundant number, since it is smaller than the sum of its proper divisors (116275716447264).

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

51203979104256 is an equidigital number, since it uses as much as digits as its factorization.

51203979104256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558972 (or 1558935 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 54.

The spelling of 51203979104256 in words is "fifty-one trillion, two hundred three billion, nine hundred seventy-nine million, one hundred four thousand, two hundred fifty-six".