51193618722 has 12 divisors (see below), whose sum is σ = 110919507270. Its totient is φ = 17064539568.

The previous prime is 51193618709. The next prime is 51193618741. The reversal of 51193618722 is 22781639115.

51193618722 is a `hidden beast` number, since 5 + 1 + 1 + 9 + 3 + 618 + 7 + 22 = 666.

It can be written as a sum of positive squares in only one way, i.e., 33584594121 + 17609024601 = 183261^2 + 132699^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1422044947 + ... + 1422044982.

Almost surely, 2^51193618722 is an apocalyptic number.

51193618722 is an abundant number, since it is smaller than the sum of its proper divisors (59725888548).

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

51193618722 is a wasteful number, since it uses less digits than its factorization.

51193618722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2844089937 (or 2844089934 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The spelling of 51193618722 in words is "fifty-one billion, one hundred ninety-three million, six hundred eighteen thousand, seven hundred twenty-two".