117578117889 has 16 divisors (see below), whose sum is σ = 174195250240. Its totient is φ = 78382961280.

The previous prime is 117578117887. The next prime is 117578117897. The reversal of 117578117889 is 988711875711.

It is not a de Polignac number, because 117578117889 - 2¹ = 117578117887 is a prime.

It is a super-2 number, since 2×117578117889² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (117578117887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1344354 + ... + 1429140.

It is an arithmetic number, because the mean of its divisors is an integer number (10887203140).

Almost surely, 2^117578117889 is an apocalyptic number.

It is an amenable number.

117578117889 is a deficient number, since it is larger than the sum of its proper divisors (56617132351).

117578117889 is an equidigital number, since it uses as much as digits as its factorization.

117578117889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136157 (or 136151 counting only the distinct ones).

The product of its digits is 7902720, while the sum is 63.

The spelling of 117578117889 in words is "one hundred seventeen billion, five hundred seventy-eight million, one hundred seventeen thousand, eight hundred eighty-nine".