51516565116 has 48 divisors (see below), whose sum is σ = 127337938560. Its totient is φ = 16164757440.

The previous prime is 51516565069. The next prime is 51516565117. The reversal of 51516565116 is 61156561515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51516565117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 683790 + ... + 755381.

It is an arithmetic number, because the mean of its divisors is an integer number (2652873720).

Almost surely, 2^51516565116 is an apocalyptic number.

It is an amenable number.

51516565116 is an abundant number, since it is smaller than the sum of its proper divisors (75821373444).

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

51516565116 is a wasteful number, since it uses less digits than its factorization.

51516565116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1439354 (or 1439352 counting only the distinct ones).

The product of its digits is 135000, while the sum is 42.

The spelling of 51516565116 in words is "fifty-one billion, five hundred sixteen million, five hundred sixty-five thousand, one hundred sixteen".