68306111538 has 64 divisors (see below), whose sum is σ = 164396144640. Its totient is φ = 18483178752.

The previous prime is 68306111509. The next prime is 68306111603. The reversal of 68306111538 is 83511160386.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 68306111538.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3015531 + ... + 3038097.

It is an arithmetic number, because the mean of its divisors is an integer number (2568689760).

Almost surely, 2^68306111538 is an apocalyptic number.

68306111538 is an abundant number, since it is smaller than the sum of its proper divisors (96090033102).

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

68306111538 is a wasteful number, since it uses less digits than its factorization.

68306111538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26391.

The product of its (nonzero) digits is 103680, while the sum is 42.

The spelling of 68306111538 in words is "sixty-eight billion, three hundred six million, one hundred eleven thousand, five hundred thirty-eight".