51233554512 has 80 divisors (see below), whose sum is σ = 168067754880. Its totient is φ = 14638157568.

The previous prime is 51233554507. The next prime is 51233554591. The reversal of 51233554512 is 21545533215.

51233554512 is a `hidden beast` number, since 51 + 2 + 3 + 3 + 554 + 51 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 8468133 + ... + 8474180.

It is an arithmetic number, because the mean of its divisors is an integer number (2100846936).

Almost surely, 2^51233554512 is an apocalyptic number.

It is an amenable number.

51233554512 is an abundant number, since it is smaller than the sum of its proper divisors (116834200368).

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

51233554512 is a wasteful number, since it uses less digits than its factorization.

51233554512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16942337 (or 16942325 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The spelling of 51233554512 in words is "fifty-one billion, two hundred thirty-three million, five hundred fifty-four thousand, five hundred twelve".