139939857218 has 16 divisors (see below), whose sum is σ = 239910849024. Its totient is φ = 59970736800.

The previous prime is 139939857173. The next prime is 139939857223. The reversal of 139939857218 is 812758939931.

It is a happy 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, 33458 + ... + 530093.

It is an arithmetic number, because the mean of its divisors is an integer number (14994428064).

Almost surely, 2^139939857218 is an apocalyptic number.

139939857218 is a deficient number, since it is larger than the sum of its proper divisors (99970991806).

139939857218 is a wasteful number, since it uses less digits than its factorization.

139939857218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581297.

The product of its digits is 29393280, while the sum is 65.

The spelling of 139939857218 in words is "one hundred thirty-nine billion, nine hundred thirty-nine million, eight hundred fifty-seven thousand, two hundred eighteen".