51394482720 has 384 divisors, whose sum is σ = 207073843200. Its totient is φ = 11661843456.

The previous prime is 51394482719. The next prime is 51394482781. The reversal of 51394482720 is 2728449315.

51394482720 is a `hidden beast` number, since 5 + 13 + 94 + 482 + 72 + 0 = 666.

51394482720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 4197247 + ... + 4209473.

It is an arithmetic number, because the mean of its divisors is an integer number (539254800).

Almost surely, 2^51394482720 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 51394482720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103536921600).

51394482720 is an abundant number, since it is smaller than the sum of its proper divisors (155679360480).

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

51394482720 is a wasteful number, since it uses less digits than its factorization.

51394482720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12397 (or 12383 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 51394482720 in words is "fifty-one billion, three hundred ninety-four million, four hundred eighty-two thousand, seven hundred twenty".