39139390668 has 24 divisors (see below), whose sum is σ = 104371708672. Its totient is φ = 11182683024.

The previous prime is 39139390663. The next prime is 39139390687. The reversal of 39139390668 is 86609393193.

39139390668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (39139390663) 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, 232972480 + ... + 232972647.

Almost surely, 2^39139390668 is an apocalyptic number.

It is an amenable number.

39139390668 is an abundant number, since it is smaller than the sum of its proper divisors (65232318004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39139390668 is a wasteful number, since it uses less digits than its factorization.

39139390668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465945141 (or 465945139 counting only the distinct ones).

The product of its (nonzero) digits is 5668704, while the sum is 57.

The spelling of 39139390668 in words is "thirty-nine billion, one hundred thirty-nine million, three hundred ninety thousand, six hundred sixty-eight".