68618807408 has 10 divisors (see below), whose sum is σ = 132948939384. Its totient is φ = 34309403696.

The previous prime is 68618807351. The next prime is 68618807423. The reversal of 68618807408 is 80470881686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2144337716 + ... + 2144337747.

Almost surely, 2^68618807408 is an apocalyptic number.

It is an amenable number.

68618807408 is a deficient number, since it is larger than the sum of its proper divisors (64330131976).

68618807408 is a wasteful number, since it uses less digits than its factorization.

68618807408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4288675471 (or 4288675465 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 56.

The spelling of 68618807408 in words is "sixty-eight billion, six hundred eighteen million, eight hundred seven thousand, four hundred eight".