117205137185 has 8 divisors (see below), whose sum is σ = 140875607400. Its totient is φ = 93611147904.

The previous prime is 117205137173. The next prime is 117205137197. The reversal of 117205137185 is 581731502711.

It is an interprime number because it is at equal distance from previous prime (117205137173) and next prime (117205137197).

It can be written as a sum of positive squares in 4 ways, for example, as 9564057616 + 107641079569 = 97796^2 + 328087^2 .

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 117205137185 - 2³⁰ = 116131395361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19116860 + ... + 19122989.

It is an arithmetic number, because the mean of its divisors is an integer number (17609450925).

Almost surely, 2^117205137185 is an apocalyptic number.

It is an amenable number.

117205137185 is a deficient number, since it is larger than the sum of its proper divisors (23670470215).

117205137185 is an equidigital number, since it uses as much as digits as its factorization.

117205137185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38240467.

The product of its (nonzero) digits is 58800, while the sum is 41.

Adding to 117205137185 its reverse (581731502711), we get a palindrome (698936639896).

The spelling of 117205137185 in words is "one hundred seventeen billion, two hundred five million, one hundred thirty-seven thousand, one hundred eighty-five".