51166611516 has 24 divisors (see below), whose sum is σ = 119665776384. Its totient is φ = 17015963440.

The previous prime is 51166611511. The next prime is 51166611521. The reversal of 51166611516 is 61511666115.

It is an interprime number because it is at equal distance from previous prime (51166611511) and next prime (51166611521).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51166611511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4941330 + ... + 4951673.

It is an arithmetic number, because the mean of its divisors is an integer number (4986074016).

Almost surely, 2^51166611516 is an apocalyptic number.

It is an amenable number.

51166611516 is an abundant number, since it is smaller than the sum of its proper divisors (68499164868).

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

51166611516 is a wasteful number, since it uses less digits than its factorization.

51166611516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9893441 (or 9893439 counting only the distinct ones).

The product of its digits is 32400, while the sum is 39.

The spelling of 51166611516 in words is "fifty-one billion, one hundred sixty-six million, six hundred eleven thousand, five hundred sixteen".