115987205987 has 16 divisors (see below), whose sum is σ = 119369564160. Its totient is φ = 112618198368.

The previous prime is 115987205981. The next prime is 115987206019. The reversal of 115987205987 is 789502789511.

It is a cyclic number.

It is not a de Polignac number, because 115987205987 - 2²⁴ = 115970428771 is a prime.

It is a Smith number, since the sum of its digits (62) 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 (115987205981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62796698 + ... + 62798544.

It is an arithmetic number, because the mean of its divisors is an integer number (7460597760).

Almost surely, 2^115987205987 is an apocalyptic number.

115987205987 is a deficient number, since it is larger than the sum of its proper divisors (3382358173).

115987205987 is a wasteful number, since it uses less digits than its factorization.

115987205987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490.

The product of its (nonzero) digits is 12700800, while the sum is 62.

The spelling of 115987205987 in words is "one hundred fifteen billion, nine hundred eighty-seven million, two hundred five thousand, nine hundred eighty-seven".