115515665 has 16 divisors (see below), whose sum is σ = 144099648. Its totient is φ = 88819776.

The previous prime is 115515661. The next prime is 115515667. The reversal of 115515665 is 566515511.

It is a cyclic number.

It is not a de Polignac number, because 115515665 - 2² = 115515661 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115515661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11594 + ... + 19116.

It is an arithmetic number, because the mean of its divisors is an integer number (9006228).

Almost surely, 2^115515665 is an apocalyptic number.

It is an amenable number.

115515665 is a deficient number, since it is larger than the sum of its proper divisors (28583983).

115515665 is an equidigital number, since it uses as much as digits as its factorization.

115515665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7648.

The product of its digits is 22500, while the sum is 35.

The square root of 115515665 is about 10747.8214071504. The cubic root of 115515665 is about 487.0201844884.

The spelling of 115515665 in words is "one hundred fifteen million, five hundred fifteen thousand, six hundred sixty-five".