117917181399 has 4 divisors (see below), whose sum is σ = 157222908536. Its totient is φ = 78611454264.

The previous prime is 117917181383. The next prime is 117917181401. The reversal of 117917181399 is 993181719711.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 117917181399 - 2⁴ = 117917181383 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 (117917181359) 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, 19652863564 + ... + 19652863569.

It is an arithmetic number, because the mean of its divisors is an integer number (39305727134).

Almost surely, 2^117917181399 is an apocalyptic number.

117917181399 is a deficient number, since it is larger than the sum of its proper divisors (39305727137).

117917181399 is an equidigital number, since it uses as much as digits as its factorization.

117917181399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39305727136.

The product of its digits is 857304, while the sum is 57.

The spelling of 117917181399 in words is "one hundred seventeen billion, nine hundred seventeen million, one hundred eighty-one thousand, three hundred ninety-nine".