117617408639 has 4 divisors (see below), whose sum is σ = 120352697256. Its totient is φ = 114882120024.

The previous prime is 117617408621. The next prime is 117617408687. The reversal of 117617408639 is 936804716711.

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

It is a cyclic number.

It is not a de Polignac number, because 117617408639 - 2⁸ = 117617408383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117617408609) 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, 1367644244 + ... + 1367644329.

It is an arithmetic number, because the mean of its divisors is an integer number (30088174314).

Almost surely, 2^117617408639 is an apocalyptic number.

117617408639 is a deficient number, since it is larger than the sum of its proper divisors (2735288617).

117617408639 is an equidigital number, since it uses as much as digits as its factorization.

117617408639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2735288616.

The product of its (nonzero) digits is 1524096, while the sum is 53.

The spelling of 117617408639 in words is "one hundred seventeen billion, six hundred seventeen million, four hundred eight thousand, six hundred thirty-nine".