115161609 has 16 divisors (see below), whose sum is σ = 157512960. Its totient is φ = 74807040.

The previous prime is 115161593. The next prime is 115161637. The reversal of 115161609 is 906161511.

It is not a de Polignac number, because 115161609 - 2⁴ = 115161593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115166609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32287 + ... + 35675.

It is an arithmetic number, because the mean of its divisors is an integer number (9844560).

Almost surely, 2^115161609 is an apocalyptic number.

It is an amenable number.

115161609 is a deficient number, since it is larger than the sum of its proper divisors (42351351).

115161609 is a wasteful number, since it uses less digits than its factorization.

115161609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3680.

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 115161609 is about 10731.3377078536. The cubic root of 115161609 is about 486.5221022940.

The spelling of 115161609 in words is "one hundred fifteen million, one hundred sixty-one thousand, six hundred nine".