115615661 has 8 divisors (see below), whose sum is σ = 132210624. Its totient is φ = 99040320.

The previous prime is 115615651. The next prime is 115615667. The reversal of 115615661 is 166516511.

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 115615661 - 2¹⁴ = 115599277 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115615667) 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, 11306 + ... + 18948.

It is an arithmetic number, because the mean of its divisors is an integer number (16526328).

Almost surely, 2^115615661 is an apocalyptic number.

It is an amenable number.

115615661 is a deficient number, since it is larger than the sum of its proper divisors (16594963).

115615661 is an equidigital number, since it uses as much as digits as its factorization.

115615661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9811.

The product of its digits is 5400, while the sum is 32.

The square root of 115615661 is about 10752.4723203550. The cubic root of 115615661 is about 487.1606734421.

The spelling of 115615661 in words is "one hundred fifteen million, six hundred fifteen thousand, six hundred sixty-one".