117699379815 has 16 divisors (see below), whose sum is σ = 188323267968. Its totient is φ = 62771582496.

The previous prime is 117699379801. The next prime is 117699379841. The reversal of 117699379815 is 518973996711.

It is a happy number.

It is not a de Polignac number, because 117699379815 - 2⁸ = 117699379559 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1200892 + ... + 1295198.

It is an arithmetic number, because the mean of its divisors is an integer number (11770204248).

Almost surely, 2^117699379815 is an apocalyptic number.

117699379815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

117699379815 is a deficient number, since it is larger than the sum of its proper divisors (70623888153).

117699379815 is an equidigital number, since it uses as much as digits as its factorization.

117699379815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177518.

The product of its digits is 25719120, while the sum is 66.

The spelling of 117699379815 in words is "one hundred seventeen billion, six hundred ninety-nine million, three hundred seventy-nine thousand, eight hundred fifteen".