68807871928 has 16 divisors (see below), whose sum is σ = 129017542680. Its totient is φ = 34403193888.

The previous prime is 68807871907. The next prime is 68807871929. The reversal of 68807871928 is 82917870886.

It is a self number, because there is not a number n which added to its sum of digits gives 68807871928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68807871929) 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, 679950 + ... + 774562.

Almost surely, 2^68807871928 is an apocalyptic number.

It is an amenable number.

68807871928 is a deficient number, since it is larger than the sum of its proper divisors (60209670752).

68807871928 is a wasteful number, since it uses less digits than its factorization.

68807871928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185526 (or 185522 counting only the distinct ones).

The product of its (nonzero) digits is 21676032, while the sum is 64.

The spelling of 68807871928 in words is "sixty-eight billion, eight hundred seven million, eight hundred seventy-one thousand, nine hundred twenty-eight".