117156878 has 4 divisors (see below), whose sum is σ = 175735320. Its totient is φ = 58578438.

The previous prime is 117156863. The next prime is 117156899. The reversal of 117156878 is 878651711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878651711 = 7 ⋅125521673.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29289218 + ... + 29289221.

It is an arithmetic number, because the mean of its divisors is an integer number (43933830).

Almost surely, 2^117156878 is an apocalyptic number.

117156878 is a deficient number, since it is larger than the sum of its proper divisors (58578442).

117156878 is an equidigital number, since it uses as much as digits as its factorization.

117156878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58578441.

The product of its digits is 94080, while the sum is 44.

The square root of 117156878 is about 10823.9030853015. The cubic root of 117156878 is about 489.3158270500.

The spelling of 117156878 in words is "one hundred seventeen million, one hundred fifty-six thousand, eight hundred seventy-eight".