115156665 has 48 divisors (see below), whose sum is σ = 217198800. Its totient is φ = 56102400.

The previous prime is 115156637. The next prime is 115156673. The reversal of 115156665 is 566651511.

It can be written as a sum of positive squares in 8 ways, for example, as 4149369 + 111007296 = 2037^2 + 10536^2 .

It is not a de Polignac number, because 115156665 - 2⁵ = 115156633 is a prime.

It is a super-2 number, since 2×115156665² = 26522114987844450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58111 + ... + 60059.

It is an arithmetic number, because the mean of its divisors is an integer number (4524975).

Almost surely, 2^115156665 is an apocalyptic number.

115156665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115156665 is a deficient number, since it is larger than the sum of its proper divisors (102042135).

115156665 is a wasteful number, since it uses less digits than its factorization.

115156665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074 (or 2071 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 115156665 is about 10731.1073519931. The cubic root of 115156665 is about 486.5151399052.

The spelling of 115156665 in words is "one hundred fifteen million, one hundred fifty-six thousand, six hundred sixty-five".