51615198908 has 48 divisors (see below), whose sum is σ = 112250611200. Its totient is φ = 20220940224.

The previous prime is 51615198889. The next prime is 51615198911. The reversal of 51615198908 is 80989151615.

It is a happy number.

It is a super-3 number, since 3×51615198908³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51615198908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 650858 + ... + 725841.

It is an arithmetic number, because the mean of its divisors is an integer number (2338554400).

Almost surely, 2^51615198908 is an apocalyptic number.

It is an amenable number.

51615198908 is an abundant number, since it is smaller than the sum of its proper divisors (60635412292).

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

51615198908 is a wasteful number, since it uses less digits than its factorization.

51615198908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376826 (or 1376824 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 53.

The spelling of 51615198908 in words is "fifty-one billion, six hundred fifteen million, one hundred ninety-eight thousand, nine hundred eight".