68291256939 has 16 divisors (see below), whose sum is σ = 98437850880. Its totient is φ = 41965607520.

The previous prime is 68291256931. The next prime is 68291256967. The reversal of 68291256939 is 93965219286.

It is not a de Polignac number, because 68291256939 - 2³ = 68291256931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68291256931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16188327 + ... + 16192544.

It is an arithmetic number, because the mean of its divisors is an integer number (6152365680).

Almost surely, 2^68291256939 is an apocalyptic number.

68291256939 is a deficient number, since it is larger than the sum of its proper divisors (30146593941).

68291256939 is a wasteful number, since it uses less digits than its factorization.

68291256939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32380930.

The product of its digits is 12597120, while the sum is 60.

The spelling of 68291256939 in words is "sixty-eight billion, two hundred ninety-one million, two hundred fifty-six thousand, nine hundred thirty-nine".