115564887 has 20 divisors (see below), whose sum is σ = 173034840. Its totient is φ = 76864464.

The previous prime is 115564877. The next prime is 115564901. The reversal of 115564887 is 788465511.

115564887 is a `hidden beast` number, since 1 + 1 + 5 + 564 + 8 + 87 = 666.

It is not a de Polignac number, because 115564887 - 2¹⁰ = 115563863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115564817) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 39828 + ... + 42630.

It is an arithmetic number, because the mean of its divisors is an integer number (8651742).

Almost surely, 2^115564887 is an apocalyptic number.

115564887 is a deficient number, since it is larger than the sum of its proper divisors (57469953).

115564887 is an equidigital number, since it uses as much as digits as its factorization.

115564887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3324 (or 3315 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The square root of 115564887 is about 10750.1110226825. Note that the first 3 decimals coincide. The cubic root of 115564887 is about 487.0893488550.

The spelling of 115564887 in words is "one hundred fifteen million, five hundred sixty-four thousand, eight hundred eighty-seven".