115561636 has 24 divisors (see below), whose sum is σ = 209757240. Its totient is φ = 55641600.

The previous prime is 115561601. The next prime is 115561643. The reversal of 115561636 is 636165511.

It can be written as a sum of positive squares in 4 ways, for example, as 15681600 + 99880036 = 3960^2 + 9994^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52396 + ... + 54556.

It is an arithmetic number, because the mean of its divisors is an integer number (8739885).

Almost surely, 2^115561636 is an apocalyptic number.

It is an amenable number.

115561636 is a deficient number, since it is larger than the sum of its proper divisors (94195604).

115561636 is a wasteful number, since it uses less digits than its factorization.

115561636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2655 (or 2653 counting only the distinct ones).

The product of its digits is 16200, while the sum is 34.

The square root of 115561636 is about 10749.9598138784. The cubic root of 115561636 is about 487.0847813133.

The spelling of 115561636 in words is "one hundred fifteen million, five hundred sixty-one thousand, six hundred thirty-six".