115544639 has 4 divisors (see below), whose sum is σ = 132051024. Its totient is φ = 99038256.

The previous prime is 115544629. The next prime is 115544641. The reversal of 115544639 is 936445511.

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

It is a cyclic number.

It is not a de Polignac number, because 115544639 - 2⁴ = 115544623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115544629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8253182 + ... + 8253195.

It is an arithmetic number, because the mean of its divisors is an integer number (33012756).

Almost surely, 2^115544639 is an apocalyptic number.

115544639 is a deficient number, since it is larger than the sum of its proper divisors (16506385).

115544639 is an equidigital number, since it uses as much as digits as its factorization.

115544639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16506384.

The product of its digits is 64800, while the sum is 38.

The square root of 115544639 is about 10749.1692237121. The cubic root of 115544639 is about 487.0608997259.

The spelling of 115544639 in words is "one hundred fifteen million, five hundred forty-four thousand, six hundred thirty-nine".