115312111555 has 4 divisors (see below), whose sum is σ = 138374533872. Its totient is φ = 92249689240.

The previous prime is 115312111549. The next prime is 115312111597. The reversal of 115312111555 is 555111213511.

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

It is not a de Polignac number, because 115312111555 - 2²¹ = 115310014403 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11531211151 + ... + 11531211160.

It is an arithmetic number, because the mean of its divisors is an integer number (34593633468).

Almost surely, 2^115312111555 is an apocalyptic number.

115312111555 is a deficient number, since it is larger than the sum of its proper divisors (23062422317).

115312111555 is an equidigital number, since it uses as much as digits as its factorization.

115312111555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23062422316.

The product of its digits is 3750, while the sum is 31.

The spelling of 115312111555 in words is "one hundred fifteen billion, three hundred twelve million, one hundred eleven thousand, five hundred fifty-five".