51616615556 has 12 divisors (see below), whose sum is σ = 98540811600. Its totient is φ = 23462097960.

The previous prime is 51616615553. The next prime is 51616615579. The reversal of 51616615556 is 65551661615.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51616615556.

It is not an unprimeable number, because it can be changed into a prime (51616615553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 586552406 + ... + 586552493.

It is an arithmetic number, because the mean of its divisors is an integer number (8211734300).

Almost surely, 2^51616615556 is an apocalyptic number.

It is an amenable number.

51616615556 is a deficient number, since it is larger than the sum of its proper divisors (46924196044).

51616615556 is a wasteful number, since it uses less digits than its factorization.

51616615556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1173104914 (or 1173104912 counting only the distinct ones).

The product of its digits is 810000, while the sum is 47.

The spelling of 51616615556 in words is "fifty-one billion, six hundred sixteen million, six hundred fifteen thousand, five hundred fifty-six".