51320804208 has 20 divisors (see below), whose sum is σ = 132578744328. Its totient is φ = 17106934720.

The previous prime is 51320804179. The next prime is 51320804219. The reversal of 51320804208 is 80240802315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 534591663 + ... + 534591758.

Almost surely, 2^51320804208 is an apocalyptic number.

It is an amenable number.

51320804208 is an abundant number, since it is smaller than the sum of its proper divisors (81257940120).

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

51320804208 is a wasteful number, since it uses less digits than its factorization.

51320804208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1069183432 (or 1069183426 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 51320804208 in words is "fifty-one billion, three hundred twenty million, eight hundred four thousand, two hundred eight".