68976998656 has 36 divisors (see below), whose sum is σ = 137703717900. Its totient is φ = 34483699712.

The previous prime is 68976998639. The next prime is 68976998683. The reversal of 68976998656 is 65689967986.

It can be written as a sum of positive squares in 2 ways, for example, as 43764640000 + 25212358656 = 209200^2 + 158784^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2466480 + ... + 2494288.

It is an arithmetic number, because the mean of its divisors is an integer number (3825103275).

Almost surely, 2^68976998656 is an apocalyptic number.

It is an amenable number.

68976998656 is a deficient number, since it is larger than the sum of its proper divisors (68726719244).

68976998656 is an equidigital number, since it uses as much as digits as its factorization.

68976998656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37514 (or 37500 counting only the distinct ones).

The product of its digits is 2116316160, while the sum is 79.

The spelling of 68976998656 in words is "sixty-eight billion, nine hundred seventy-six million, nine hundred ninety-eight thousand, six hundred fifty-six".