51212616287556 has 24 divisors (see below), whose sum is σ = 119496896275680. Its totient is φ = 17070759009472.

The previous prime is 51212616287543. The next prime is 51212616287603. The reversal of 51212616287556 is 65578261621215.

It is a junction number, because it is equal to n+sod(n) for n = 51212616287496 and 51212616287505.

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, 12238686 + ... + 15881141.

It is an arithmetic number, because the mean of its divisors is an integer number (4979037344820).

Almost surely, 2^{51212616287556} is an apocalyptic number.

It is an amenable number.

51212616287556 is an abundant number, since it is smaller than the sum of its proper divisors (68284279988124).

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

51212616287556 is a wasteful number, since it uses less digits than its factorization.

51212616287556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28271603 (or 28271601 counting only the distinct ones).

The product of its digits is 12096000, while the sum is 57.

The spelling of 51212616287556 in words is "fifty-one trillion, two hundred twelve billion, six hundred sixteen million, two hundred eighty-seven thousand, five hundred fifty-six".