51361699164 has 24 divisors (see below), whose sum is σ = 119859561360. Its totient is φ = 17118338304.

The previous prime is 51361699159. The next prime is 51361699171. The reversal of 51361699164 is 46199616315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181099 + ... + 368130.

It is an arithmetic number, because the mean of its divisors is an integer number (4994148390).

Almost surely, 2^51361699164 is an apocalyptic number.

It is an amenable number.

51361699164 is an abundant number, since it is smaller than the sum of its proper divisors (68497862196).

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

51361699164 is a wasteful number, since it uses less digits than its factorization.

51361699164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557029 (or 557027 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 51.

The spelling of 51361699164 in words is "fifty-one billion, three hundred sixty-one million, six hundred ninety-nine thousand, one hundred sixty-four".