68163029979 has 16 divisors (see below), whose sum is σ = 99372092160. Its totient is φ = 41216816160.

The previous prime is 68163029947. The next prime is 68163029999. The reversal of 68163029979 is 97992036186.

It is not a de Polignac number, because 68163029979 - 2⁵ = 68163029947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68163029939) 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, 2338072 + ... + 2367045.

It is an arithmetic number, because the mean of its divisors is an integer number (6210755760).

Almost surely, 2^68163029979 is an apocalyptic number.

68163029979 is a deficient number, since it is larger than the sum of its proper divisors (31209062181).

68163029979 is a wasteful number, since it uses less digits than its factorization.

68163029979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4705570.

The product of its (nonzero) digits is 8817984, while the sum is 60.

The spelling of 68163029979 in words is "sixty-eight billion, one hundred sixty-three million, twenty-nine thousand, nine hundred seventy-nine".