68715775923 has 16 divisors (see below), whose sum is σ = 94884658176. Its totient is φ = 44188333920.

The previous prime is 68715775903. The next prime is 68715775949. The reversal of 68715775923 is 32957751786.

It is a happy number.

It is not a de Polignac number, because 68715775923 - 2²² = 68711581619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68715775903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1174836 + ... + 1231937.

It is an arithmetic number, because the mean of its divisors is an integer number (5930291136).

Almost surely, 2^68715775923 is an apocalyptic number.

68715775923 is a deficient number, since it is larger than the sum of its proper divisors (26168882253).

68715775923 is a wasteful number, since it uses less digits than its factorization.

68715775923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2407114.

The product of its digits is 22226400, while the sum is 60.

The spelling of 68715775923 in words is "sixty-eight billion, seven hundred fifteen million, seven hundred seventy-five thousand, nine hundred twenty-three".