139601607615209 has 4 divisors (see below), whose sum is σ = 139601786543700. Its totient is φ = 139601428686720.

The previous prime is 139601607615193. The next prime is 139601607615233. The reversal of 139601607615209 is 902516706106931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 109259522641984 + 30342084973225 = 10452728^2 + 5508365^2 .

It is a cyclic number.

It is not a de Polignac number, because 139601607615209 - 2⁴ = 139601607615193 is a prime.

It is a super-2 number, since 2×139601607615209² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139601607645209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88288784 + ... + 89856065.

It is an arithmetic number, because the mean of its divisors is an integer number (34900446635925).

Almost surely, 2^{139601607615209} is an apocalyptic number.

It is an amenable number.

139601607615209 is a deficient number, since it is larger than the sum of its proper divisors (178928491).

139601607615209 is an equidigital number, since it uses as much as digits as its factorization.

139601607615209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178928490.

The product of its (nonzero) digits is 3674160, while the sum is 56.

The spelling of 139601607615209 in words is "one hundred thirty-nine trillion, six hundred one billion, six hundred seven million, six hundred fifteen thousand, two hundred nine".