115601645 has 4 divisors (see below), whose sum is σ = 138721980. Its totient is φ = 92481312.

The previous prime is 115601641. The next prime is 115601663. The reversal of 115601645 is 546106511.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 30261001 + 85340644 = 5501^2 + 9238^2 .

It is a cyclic number.

It is not a de Polignac number, because 115601645 - 2² = 115601641 is a prime.

It is a super-3 number, since 3×115601645³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115601641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11560160 + ... + 11560169.

It is an arithmetic number, because the mean of its divisors is an integer number (34680495).

Almost surely, 2^115601645 is an apocalyptic number.

It is an amenable number.

115601645 is a deficient number, since it is larger than the sum of its proper divisors (23120335).

115601645 is an equidigital number, since it uses as much as digits as its factorization.

115601645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23120334.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 115601645 is about 10751.8205435173. The cubic root of 115601645 is about 487.1409866053.

The spelling of 115601645 in words is "one hundred fifteen million, six hundred one thousand, six hundred forty-five".