115043661 has 6 divisors (see below), whose sum is σ = 166174190. Its totient is φ = 76695768.

The previous prime is 115043659. The next prime is 115043681. The reversal of 115043661 is 166340511.

It can be written as a sum of positive squares in only one way, i.e., 75429225 + 39614436 = 8685^2 + 6294^2 .

It is not a de Polignac number, because 115043661 - 2¹ = 115043659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115043681) 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 5 ways as a sum of consecutive naturals, for example, 6391306 + ... + 6391323.

Almost surely, 2^115043661 is an apocalyptic number.

It is an amenable number.

115043661 is a deficient number, since it is larger than the sum of its proper divisors (51130529).

115043661 is a wasteful number, since it uses less digits than its factorization.

115043661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12782635 (or 12782632 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 115043661 is about 10725.8408062026. The cubic root of 115043661 is about 486.3559476426.

The spelling of 115043661 in words is "one hundred fifteen million, forty-three thousand, six hundred sixty-one".