68979142323 has 64 divisors (see below), whose sum is σ = 126477388800. Its totient is φ = 36181105920.

The previous prime is 68979142321. The next prime is 68979142357. The reversal of 68979142323 is 32324197986.

It is not a de Polignac number, because 68979142323 - 2¹ = 68979142321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68979142323.

It is not an unprimeable number, because it can be changed into a prime (68979142321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 361383 + ... + 518223.

It is an arithmetic number, because the mean of its divisors is an integer number (1976209200).

Almost surely, 2^68979142323 is an apocalyptic number.

68979142323 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

68979142323 is a deficient number, since it is larger than the sum of its proper divisors (57498246477).

68979142323 is a wasteful number, since it uses less digits than its factorization.

68979142323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157049 (or 157043 counting only the distinct ones).

The product of its digits is 3919104, while the sum is 54.

The spelling of 68979142323 in words is "sixty-eight billion, nine hundred seventy-nine million, one hundred forty-two thousand, three hundred twenty-three".