68139458736 has 40 divisors (see below), whose sum is σ = 181705227264. Its totient is φ = 21980470080.

The previous prime is 68139458731. The next prime is 68139458773. The reversal of 68139458736 is 63785493186.

It is a self number, because there is not a number n which added to its sum of digits gives 68139458736.

It is not an unprimeable number, because it can be changed into a prime (68139458731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22894836 + ... + 22897811.

Almost surely, 2^68139458736 is an apocalyptic number.

It is an amenable number.

68139458736 is an abundant number, since it is smaller than the sum of its proper divisors (113565768528).

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

68139458736 is a wasteful number, since it uses less digits than its factorization.

68139458736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45792689 (or 45792683 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 60.

The spelling of 68139458736 in words is "sixty-eight billion, one hundred thirty-nine million, four hundred fifty-eight thousand, seven hundred thirty-six".