115155665015 has 4 divisors (see below), whose sum is σ = 138186798024. Its totient is φ = 92124532008.

The previous prime is 115155665011. The next prime is 115155665017. The reversal of 115155665015 is 510566551511.

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 115155665015 - 2² = 115155665011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115155665011) 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, 11515566497 + ... + 11515566506.

It is an arithmetic number, because the mean of its divisors is an integer number (34546699506).

Almost surely, 2^115155665015 is an apocalyptic number.

115155665015 is a deficient number, since it is larger than the sum of its proper divisors (23031133009).

115155665015 is an equidigital number, since it uses as much as digits as its factorization.

115155665015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23031133008.

The product of its (nonzero) digits is 112500, while the sum is 41.

The spelling of 115155665015 in words is "one hundred fifteen billion, one hundred fifty-five million, six hundred sixty-five thousand, fifteen".