117917821514189 has 8 divisors (see below), whose sum is σ = 118009679167512. Its totient is φ = 117825981102400.

The previous prime is 117917821514027. The next prime is 117917821514239. The reversal of 117917821514189 is 981415128719711.

It can be written as a sum of positive squares in 4 ways, for example, as 3284032596100 + 114633788918089 = 1812190^2 + 10706717^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117917821514189 - 2²⁸ = 117917553078733 is a prime.

It is a super-2 number, since 2×117917821514189² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117917821513189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9390239 + ... + 18000339.

It is an arithmetic number, because the mean of its divisors is an integer number (14751209895939).

Almost surely, 2^{117917821514189} is an apocalyptic number.

It is an amenable number.

117917821514189 is a deficient number, since it is larger than the sum of its proper divisors (91857653323).

117917821514189 is an equidigital number, since it uses as much as digits as its factorization.

117917821514189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8620767.

The product of its digits is 10160640, while the sum is 65.

The spelling of 117917821514189 in words is "one hundred seventeen trillion, nine hundred seventeen billion, eight hundred twenty-one million, five hundred fourteen thousand, one hundred eighty-nine".