115865305587 has 48 divisors (see below), whose sum is σ = 177821879040. Its totient is φ = 72447590400.

The previous prime is 115865305547. The next prime is 115865305651. The reversal of 115865305587 is 785503568511.

115865305587 is a `hidden beast` number, since 1 + 1 + 5 + 8 + 6 + 53 + 0 + 5 + 587 = 666.

It is not a de Polignac number, because 115865305587 - 2¹⁰ = 115865304563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115865305547) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80517214 + ... + 80518652.

It is an arithmetic number, because the mean of its divisors is an integer number (3704622480).

Almost surely, 2^115865305587 is an apocalyptic number.

115865305587 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

115865305587 is a deficient number, since it is larger than the sum of its proper divisors (61956573453).

115865305587 is a wasteful number, since it uses less digits than its factorization.

115865305587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924 (or 2921 counting only the distinct ones).

The product of its (nonzero) digits is 5040000, while the sum is 54.

The spelling of 115865305587 in words is "one hundred fifteen billion, eight hundred sixty-five million, three hundred five thousand, five hundred eighty-seven".