68720636976 has 80 divisors (see below), whose sum is σ = 181206375264. Its totient is φ = 22433861632.

The previous prime is 68720636927. The next prime is 68720637017. The reversal of 68720636976 is 67963602786.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1392760 + ... + 1441256.

Almost surely, 2^68720636976 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68720636976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90603187632).

68720636976 is an abundant number, since it is smaller than the sum of its proper divisors (112485738288).

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

68720636976 is a wasteful number, since it uses less digits than its factorization.

68720636976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49118 (or 49112 counting only the distinct ones).

The product of its (nonzero) digits is 27433728, while the sum is 60.

The spelling of 68720636976 in words is "sixty-eight billion, seven hundred twenty million, six hundred thirty-six thousand, nine hundred seventy-six".