51091673612 has 48 divisors (see below), whose sum is σ = 102748907520. Its totient is φ = 21775450752.

The previous prime is 51091673587. The next prime is 51091673629. The reversal of 51091673612 is 21637619015.

It is a super-2 number, since 2×51091673612² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51091673612.

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, 6845939 + ... + 6853397.

It is an arithmetic number, because the mean of its divisors is an integer number (2140602240).

Almost surely, 2^51091673612 is an apocalyptic number.

It is an amenable number.

51091673612 is an abundant number, since it is smaller than the sum of its proper divisors (51657233908).

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

51091673612 is a wasteful number, since it uses less digits than its factorization.

51091673612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8790 (or 8788 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The spelling of 51091673612 in words is "fifty-one billion, ninety-one million, six hundred seventy-three thousand, six hundred twelve".