51136922128 has 20 divisors (see below), whose sum is σ = 99097345360. Its totient is φ = 25563413664.

The previous prime is 51136922119. The next prime is 51136922191. The reversal of 51136922128 is 82122963115.

It is a happy number.

It is a super-2 number, since 2×51136922128² (a number of 22 digits) contains 22 as substring.

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, 231198 + ... + 394621.

It is an arithmetic number, because the mean of its divisors is an integer number (4954867268).

Almost surely, 2^51136922128 is an apocalyptic number.

It is an amenable number.

51136922128 is a deficient number, since it is larger than the sum of its proper divisors (47960423232).

51136922128 is a wasteful number, since it uses less digits than its factorization.

51136922128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630934 (or 630928 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The spelling of 51136922128 in words is "fifty-one billion, one hundred thirty-six million, nine hundred twenty-two thousand, one hundred twenty-eight".