117878693121 has 32 divisors (see below), whose sum is σ = 199786321920. Its totient is φ = 67290622992.

The previous prime is 117878693113. The next prime is 117878693131. The reversal of 117878693121 is 121396878711.

It is not a de Polignac number, because 117878693121 - 2³ = 117878693113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (117878693111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 131455 + ... + 503028.

It is an arithmetic number, because the mean of its divisors is an integer number (6243322560).

Almost surely, 2^117878693121 is an apocalyptic number.

It is an amenable number.

117878693121 is a deficient number, since it is larger than the sum of its proper divisors (81907628799).

117878693121 is an equidigital number, since it uses as much as digits as its factorization.

117878693121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635482 (or 635476 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 54.

The spelling of 117878693121 in words is "one hundred seventeen billion, eight hundred seventy-eight million, six hundred ninety-three thousand, one hundred twenty-one".