68476985279 has 4 divisors (see below), whose sum is σ = 70685920320. Its totient is φ = 66268050240.

The previous prime is 68476985243. The next prime is 68476985377. The reversal of 68476985279 is 97258967486.

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

It is not a de Polignac number, because 68476985279 - 2²⁸ = 68208549823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68476955279) 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, 1104467474 + ... + 1104467535.

It is an arithmetic number, because the mean of its divisors is an integer number (17671480080).

Almost surely, 2^68476985279 is an apocalyptic number.

68476985279 is a deficient number, since it is larger than the sum of its proper divisors (2208935041).

68476985279 is a wasteful number, since it uses less digits than its factorization.

68476985279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208935040.

The product of its digits is 365783040, while the sum is 71.

The spelling of 68476985279 in words is "sixty-eight billion, four hundred seventy-six million, nine hundred eighty-five thousand, two hundred seventy-nine".