68818307507 has 4 divisors (see below), whose sum is σ = 68837979000. Its totient is φ = 68798636016.

The previous prime is 68818307497. The next prime is 68818307561. The reversal of 68818307507 is 70570381886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68818307507 - 2²⁰ = 68817258931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68818307807) 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, 9830498 + ... + 9837495.

It is an arithmetic number, because the mean of its divisors is an integer number (17209494750).

Almost surely, 2^68818307507 is an apocalyptic number.

68818307507 is a deficient number, since it is larger than the sum of its proper divisors (19671493).

68818307507 is a wasteful number, since it uses less digits than its factorization.

68818307507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19671492.

The product of its (nonzero) digits is 2257920, while the sum is 53.

The spelling of 68818307507 in words is "sixty-eight billion, eight hundred eighteen million, three hundred seven thousand, five hundred seven".