115578065 has 4 divisors (see below), whose sum is σ = 138693684. Its totient is φ = 92462448.

The previous prime is 115578061. The next prime is 115578077. The reversal of 115578065 is 560875511.

It is a happy number.

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 80425024 + 35153041 = 8968^2 + 5929^2 .

It is a cyclic number.

It is not a de Polignac number, because 115578065 - 2² = 115578061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115578061) 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, 11557802 + ... + 11557811.

It is an arithmetic number, because the mean of its divisors is an integer number (34673421).

Almost surely, 2^115578065 is an apocalyptic number.

It is an amenable number.

115578065 is a deficient number, since it is larger than the sum of its proper divisors (23115619).

115578065 is an equidigital number, since it uses as much as digits as its factorization.

115578065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23115618.

The product of its (nonzero) digits is 42000, while the sum is 38.

The square root of 115578065 is about 10750.7239291129. The cubic root of 115578065 is about 487.1078626085.

The spelling of 115578065 in words is "one hundred fifteen million, five hundred seventy-eight thousand, sixty-five".