115537681 has 8 divisors (see below), whose sum is σ = 134014400. Its totient is φ = 97553808.

The previous prime is 115537679. The next prime is 115537687. The reversal of 115537681 is 186735511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115537681 - 2¹ = 115537679 is a prime.

It is a super-2 number, since 2×115537681² = 26697911461715522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115537681.

It is not an unprimeable number, because it can be changed into a prime (115537687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122706 + ... + 123643.

It is an arithmetic number, because the mean of its divisors is an integer number (16751800).

Almost surely, 2^115537681 is an apocalyptic number.

It is an amenable number.

115537681 is a deficient number, since it is larger than the sum of its proper divisors (18476719).

115537681 is an equidigital number, since it uses as much as digits as its factorization.

115537681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246423.

The product of its digits is 25200, while the sum is 37.

The square root of 115537681 is about 10748.8455659201. The cubic root of 115537681 is about 487.0511227317.

The spelling of 115537681 in words is "one hundred fifteen million, five hundred thirty-seven thousand, six hundred eighty-one".