68388972593 has 16 divisors (see below), whose sum is σ = 72363148416. Its totient is φ = 64498769280.

The previous prime is 68388972539. The next prime is 68388972599. The reversal of 68388972593 is 39527988386.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68388972593 is a prime.

It is a super-2 number, since 2×68388972593² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68388972599) 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 15 ways as a sum of consecutive naturals, for example, 8678171 + ... + 8686047.

It is an arithmetic number, because the mean of its divisors is an integer number (4522696776).

Almost surely, 2^68388972593 is an apocalyptic number.

It is an amenable number.

68388972593 is a deficient number, since it is larger than the sum of its proper divisors (3974175823).

68388972593 is a wasteful number, since it uses less digits than its factorization.

68388972593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13144.

The product of its digits is 156764160, while the sum is 68.

The spelling of 68388972593 in words is "sixty-eight billion, three hundred eighty-eight million, nine hundred seventy-two thousand, five hundred ninety-three".