115665161515 has 16 divisors (see below), whose sum is σ = 139744196928. Its totient is φ = 91903021056.

The previous prime is 115665161509. The next prime is 115665161611. The reversal of 115665161515 is 515161566511.

It is a cyclic number.

It is not a de Polignac number, because 115665161515 - 2⁵ = 115665161483 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 498274 + ... + 692536.

It is an arithmetic number, because the mean of its divisors is an integer number (8734012308).

Almost surely, 2^115665161515 is an apocalyptic number.

115665161515 is a deficient number, since it is larger than the sum of its proper divisors (24079035413).

115665161515 is a wasteful number, since it uses less digits than its factorization.

115665161515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195078.

The product of its digits is 135000, while the sum is 43.

The spelling of 115665161515 in words is "one hundred fifteen billion, six hundred sixty-five million, one hundred sixty-one thousand, five hundred fifteen".