117654963815 has 4 divisors (see below), whose sum is σ = 141185956584. Its totient is φ = 94123971048.

The previous prime is 117654963779. The next prime is 117654963817. The reversal of 117654963815 is 518369456711.

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 117654963815 - 2²⁴ = 117638186599 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 (117654963817) 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, 11765496377 + ... + 11765496386.

It is an arithmetic number, because the mean of its divisors is an integer number (35296489146).

Almost surely, 2^117654963815 is an apocalyptic number.

117654963815 is a deficient number, since it is larger than the sum of its proper divisors (23530992769).

117654963815 is an equidigital number, since it uses as much as digits as its factorization.

117654963815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23530992768.

The product of its digits is 5443200, while the sum is 56.

The spelling of 117654963815 in words is "one hundred seventeen billion, six hundred fifty-four million, nine hundred sixty-three thousand, eight hundred fifteen".