115187194417 has 4 divisors (see below), whose sum is σ = 116027976996. Its totient is φ = 114346411840.

The previous prime is 115187194391. The next prime is 115187194459. The reversal of 115187194417 is 714491781511.

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

It can be written as a sum of positive squares in 2 ways, for example, as 99079523361 + 16107671056 = 314769^2 + 126916^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115187194417 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115187194517) 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 3 ways as a sum of consecutive naturals, for example, 420391084 + ... + 420391357.

It is an arithmetic number, because the mean of its divisors is an integer number (29006994249).

Almost surely, 2^115187194417 is an apocalyptic number.

It is an amenable number.

115187194417 is a deficient number, since it is larger than the sum of its proper divisors (840782579).

115187194417 is an equidigital number, since it uses as much as digits as its factorization.

115187194417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840782578.

The product of its digits is 282240, while the sum is 49.

The spelling of 115187194417 in words is "one hundred fifteen billion, one hundred eighty-seven million, one hundred ninety-four thousand, four hundred seventeen".