115613685 has 72 divisors (see below), whose sum is σ = 233415000. Its totient is φ = 52715520.

The previous prime is 115613683. The next prime is 115613699. The reversal of 115613685 is 586316511.

115613685 is a `hidden beast` number, since 11 + 561 + 3 + 6 + 85 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 19554084 + 96059601 = 4422^2 + 9801^2 .

It is not a de Polignac number, because 115613685 - 2¹ = 115613683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115613683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 91941 + ... + 93189.

It is an arithmetic number, because the mean of its divisors is an integer number (3241875).

Almost surely, 2^115613685 is an apocalyptic number.

115613685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115613685 is an abundant number, since it is smaller than the sum of its proper divisors (117801315).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115613685 is a wasteful number, since it uses less digits than its factorization.

115613685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299 (or 1285 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 115613685 is about 10752.3804341178. The cubic root of 115613685 is about 487.1578980540.

It can be divided in two parts, 1156 and 13685, that added together give a palindrome (14841).

The spelling of 115613685 in words is "one hundred fifteen million, six hundred thirteen thousand, six hundred eighty-five".