68218815624 has 32 divisors (see below), whose sum is σ = 170853261120. Its totient is φ = 22698775616.

The previous prime is 68218815617. The next prime is 68218815631. The reversal of 68218815624 is 42651881286.

It is an interprime number because it is at equal distance from previous prime (68218815617) and next prime (68218815631).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2538204 + ... + 2564939.

It is an arithmetic number, because the mean of its divisors is an integer number (5339164410).

Almost surely, 2^68218815624 is an apocalyptic number.

It is an amenable number.

68218815624 is an abundant number, since it is smaller than the sum of its proper divisors (102634445496).

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

68218815624 is a wasteful number, since it uses less digits than its factorization.

68218815624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5103709 (or 5103705 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 51.

The spelling of 68218815624 in words is "sixty-eight billion, two hundred eighteen million, eight hundred fifteen thousand, six hundred twenty-four".