115611161565 has 16 divisors (see below), whose sum is σ = 186884849088. Its totient is φ = 61023622656.

The previous prime is 115611161531. The next prime is 115611161597. The reversal of 115611161565 is 565161116511.

It is not a de Polignac number, because 115611161565 - 2⁷ = 115611161437 is a prime.

It is a Curzon number.

It is a congruent 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, 39727467 + ... + 39730376.

It is an arithmetic number, because the mean of its divisors is an integer number (11680303068).

Almost surely, 2^115611161565 is an apocalyptic number.

115611161565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115611161565 is a deficient number, since it is larger than the sum of its proper divisors (71273687523).

115611161565 is an equidigital number, since it uses as much as digits as its factorization.

115611161565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79457948.

The product of its digits is 27000, while the sum is 39.

The spelling of 115611161565 in words is "one hundred fifteen billion, six hundred eleven million, one hundred sixty-one thousand, five hundred sixty-five".