13908135138 has 16 divisors (see below), whose sum is σ = 27828130176. Its totient is φ = 4634068400.

The previous prime is 13908135133. The next prime is 13908135179. The reversal of 13908135138 is 83153180931.

It is a self number, because there is not a number n which added to its sum of digits gives 13908135138.

It is not an unprimeable number, because it can be changed into a prime (13908135133) 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, 478881 + ... + 507092.

It is an arithmetic number, because the mean of its divisors is an integer number (1739258136).

Almost surely, 2^13908135138 is an apocalyptic number.

13908135138 is an abundant number, since it is smaller than the sum of its proper divisors (13919995038).

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

13908135138 is a wasteful number, since it uses less digits than its factorization.

13908135138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988329.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 13908135138 in words is "thirteen billion, nine hundred eight million, one hundred thirty-five thousand, one hundred thirty-eight".