68315715918 has 48 divisors (see below), whose sum is σ = 153162500400. Its totient is φ = 21980770560.

The previous prime is 68315715911. The next prime is 68315715953. The reversal of 68315715918 is 81951751386.

It is a happy number.

68315715918 is a `hidden beast` number, since 6 + 8 + 3 + 1 + 571 + 59 + 18 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68315715911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2198373 + ... + 2229231.

It is an arithmetic number, because the mean of its divisors is an integer number (3190885425).

Almost surely, 2^68315715918 is an apocalyptic number.

68315715918 is an abundant number, since it is smaller than the sum of its proper divisors (84846784482).

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

68315715918 is a wasteful number, since it uses less digits than its factorization.

68315715918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35137 (or 35134 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 54.

The spelling of 68315715918 in words is "sixty-eight billion, three hundred fifteen million, seven hundred fifteen thousand, nine hundred eighteen".