51307664740612 has 18 divisors (see below), whose sum is σ = 104447746079502. Its totient is φ = 21988999174464.

The previous prime is 51307664740603. The next prime is 51307664740679. The reversal of 51307664740612 is 21604746670315.

It can be written as a sum of positive squares in only one way, i.e., 41103690598656 + 10203974141956 = 6411216^2 + 3194366^2 .

It is a super-2 number, since 2×51307664740612² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51307664740612.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 130886899653 + ... + 130886900044.

Almost surely, 2^{51307664740612} is an apocalyptic number.

It is an amenable number.

51307664740612 is an abundant number, since it is smaller than the sum of its proper divisors (53140081338890).

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

51307664740612 is a wasteful number, since it uses less digits than its factorization.

51307664740612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261773799715 (or 261773799706 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 51307664740612 in words is "fifty-one trillion, three hundred seven billion, six hundred sixty-four million, seven hundred forty thousand, six hundred twelve".