115161618 has 64 divisors (see below), whose sum is σ = 274176000. Its totient is φ = 31786560.

The previous prime is 115161593. The next prime is 115161637. The reversal of 115161618 is 816161511.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66933 + ... + 68631.

It is an arithmetic number, because the mean of its divisors is an integer number (4284000).

Almost surely, 2^115161618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115161618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137088000).

115161618 is an abundant number, since it is smaller than the sum of its proper divisors (159014382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115161618 is a wasteful number, since it uses less digits than its factorization.

115161618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807.

The product of its digits is 1440, while the sum is 30.

The square root of 115161618 is about 10731.3381271862. The cubic root of 115161618 is about 486.5221149680.

The spelling of 115161618 in words is "one hundred fifteen million, one hundred sixty-one thousand, six hundred eighteen".