51306399908280 has 256 divisors, whose sum is σ = 186794359718400. Its totient is φ = 12422872949760.

The previous prime is 51306399908251. The next prime is 51306399908299. The reversal of 51306399908280 is 8280999360315.

51306399908280 is a `hidden beast` number, since 5 + 1 + 3 + 0 + 6 + 399 + 90 + 82 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7213684 + ... + 12435836.

It is an arithmetic number, because the mean of its divisors is an integer number (729665467650).

Almost surely, 2^{51306399908280} 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 51306399908280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93397179859200).

51306399908280 is an abundant number, since it is smaller than the sum of its proper divisors (135487959810120).

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

51306399908280 is a wasteful number, since it uses less digits than its factorization.

51306399908280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223011 (or 5223001 counting only the distinct ones).

The product of its (nonzero) digits is 25194240, while the sum is 63.

The spelling of 51306399908280 in words is "fifty-one trillion, three hundred six billion, three hundred ninety-nine million, nine hundred eight thousand, two hundred eighty".