68515932916 has 12 divisors (see below), whose sum is σ = 119913609060. Its totient is φ = 34254901760.

The previous prime is 68515932911. The next prime is 68515932923. The reversal of 68515932916 is 61923951586.

It can be written as a sum of positive squares in 2 ways, for example, as 65538048016 + 2977884900 = 256004^2 + 54570^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68515932911) 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, 715501 + ... + 805588.

It is an arithmetic number, because the mean of its divisors is an integer number (9992800755).

Almost surely, 2^68515932916 is an apocalyptic number.

It is an amenable number.

68515932916 is a deficient number, since it is larger than the sum of its proper divisors (51397676144).

68515932916 is a wasteful number, since it uses less digits than its factorization.

68515932916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1532354 (or 1532352 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 55.

The spelling of 68515932916 in words is "sixty-eight billion, five hundred fifteen million, nine hundred thirty-two thousand, nine hundred sixteen".