68107938139 has 8 divisors (see below), whose sum is σ = 70516181520. Its totient is φ = 65703674400.

The previous prime is 68107938053. The next prime is 68107938179. The reversal of 68107938139 is 93183970186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68107938139 - 2⁷ = 68107938011 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68107938139.

It is not an unprimeable number, because it can be changed into a prime (68107938179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960057 + ... + 1028554.

It is an arithmetic number, because the mean of its divisors is an integer number (8814522690).

Almost surely, 2^68107938139 is an apocalyptic number.

68107938139 is a deficient number, since it is larger than the sum of its proper divisors (2408243381).

68107938139 is a wasteful number, since it uses less digits than its factorization.

68107938139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1989821.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 68107938139 in words is "sixty-eight billion, one hundred seven million, nine hundred thirty-eight thousand, one hundred thirty-nine".