115991287867 has 8 divisors (see below), whose sum is σ = 142758508256. Its totient is φ = 91773326592.

The previous prime is 115991287843. The next prime is 115991287877. The reversal of 115991287867 is 768782199511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115991287867 is a prime.

It is a super-2 number, since 2×115991287867² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 115991287799 and 115991287808.

It is not an unprimeable number, because it can be changed into a prime (115991287877) 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, 637314678 + ... + 637314859.

It is an arithmetic number, because the mean of its divisors is an integer number (17844813532).

Almost surely, 2^115991287867 is an apocalyptic number.

115991287867 is a deficient number, since it is larger than the sum of its proper divisors (26767220389).

115991287867 is a wasteful number, since it uses less digits than its factorization.

115991287867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274629557.

The product of its digits is 15240960, while the sum is 64.

The spelling of 115991287867 in words is "one hundred fifteen billion, nine hundred ninety-one million, two hundred eighty-seven thousand, eight hundred sixty-seven".