117888895679 has 4 divisors (see below), whose sum is σ = 120764234640. Its totient is φ = 115013556720.

The previous prime is 117888895627. The next prime is 117888895687. The reversal of 117888895679 is 976598888711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976598888711 = 6827 ⋅143049493.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117888895679 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 (117888895379) 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, 1437669419 + ... + 1437669500.

It is an arithmetic number, because the mean of its divisors is an integer number (30191058660).

Almost surely, 2^117888895679 is an apocalyptic number.

117888895679 is a deficient number, since it is larger than the sum of its proper divisors (2875338961).

117888895679 is an equidigital number, since it uses as much as digits as its factorization.

117888895679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875338960.

The product of its digits is 487710720, while the sum is 77.

The spelling of 117888895679 in words is "one hundred seventeen billion, eight hundred eighty-eight million, eight hundred ninety-five thousand, six hundred seventy-nine".