51539808316 has 6 divisors (see below), whose sum is σ = 90194664560. Its totient is φ = 25769904156.

The previous prime is 51539808263. The next prime is 51539808317. The reversal of 51539808316 is 61380893515.

It is a self number, because there is not a number n which added to its sum of digits gives 51539808316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51539808317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6442476036 + ... + 6442476043.

Almost surely, 2^51539808316 is an apocalyptic number.

It is an amenable number.

51539808316 is a deficient number, since it is larger than the sum of its proper divisors (38654856244).

51539808316 is a wasteful number, since it uses less digits than its factorization.

51539808316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12884952083 (or 12884952081 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

The spelling of 51539808316 in words is "fifty-one billion, five hundred thirty-nine million, eight hundred eight thousand, three hundred sixteen".