13439078289 has 72 divisors (see below), whose sum is σ = 25380205760. Its totient is φ = 6671642112.

The previous prime is 13439078249. The next prime is 13439078293. The reversal of 13439078289 is 98287093431.

It is not a de Polignac number, because 13439078289 - 2²⁴ = 13422301073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13439078249) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 208302 + ... + 265080.

Almost surely, 2^13439078289 is an apocalyptic number.

It is an amenable number.

13439078289 is a deficient number, since it is larger than the sum of its proper divisors (11941127471).

13439078289 is a wasteful number, since it uses less digits than its factorization.

13439078289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56839 (or 56819 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 13439078289 in words is "thirteen billion, four hundred thirty-nine million, seventy-eight thousand, two hundred eighty-nine".