68819375638 has 16 divisors (see below), whose sum is σ = 117020801520. Its totient is φ = 30091062816.

The previous prime is 68819375627. The next prime is 68819375659. The reversal of 68819375638 is 83657391886.

It is a super-2 number, since 2×68819375638² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68819375638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69654745 + ... + 69655732.

It is an arithmetic number, because the mean of its divisors is an integer number (7313800095).

Almost surely, 2^68819375638 is an apocalyptic number.

68819375638 is a deficient number, since it is larger than the sum of its proper divisors (48201425882).

68819375638 is a wasteful number, since it uses less digits than its factorization.

68819375638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139310511.

The product of its digits is 52254720, while the sum is 64.

The spelling of 68819375638 in words is "sixty-eight billion, eight hundred nineteen million, three hundred seventy-five thousand, six hundred thirty-eight".