51912403808 has 48 divisors (see below), whose sum is σ = 102512692800. Its totient is φ = 25877569536.

The previous prime is 51912403789. The next prime is 51912403811. The reversal of 51912403808 is 80830421915.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20364518 + ... + 20367066.

It is an arithmetic number, because the mean of its divisors is an integer number (2135681100).

Almost surely, 2^51912403808 is an apocalyptic number.

It is an amenable number.

51912403808 is a deficient number, since it is larger than the sum of its proper divisors (50600288992).

51912403808 is a wasteful number, since it uses less digits than its factorization.

51912403808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4239 (or 4231 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The spelling of 51912403808 in words is "fifty-one billion, nine hundred twelve million, four hundred three thousand, eight hundred eight".