51321780468 has 60 divisors (see below), whose sum is σ = 153331745952. Its totient is φ = 14663365200.

The previous prime is 51321780431. The next prime is 51321780481. The reversal of 51321780468 is 86408712315.

51321780468 is a `hidden beast` number, since 5 + 13 + 2 + 178 + 0 + 468 = 666.

51321780468 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11312058 + ... + 11316593.

Almost surely, 2^51321780468 is an apocalyptic number.

It is an amenable number.

51321780468 is an abundant number, since it is smaller than the sum of its proper divisors (102009965484).

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

51321780468 is a wasteful number, since it uses less digits than its factorization.

51321780468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22628674 (or 22628663 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The spelling of 51321780468 in words is "fifty-one billion, three hundred twenty-one million, seven hundred eighty thousand, four hundred sixty-eight".