115643811 has 4 divisors (see below), whose sum is σ = 154191752. Its totient is φ = 77095872.

The previous prime is 115643807. The next prime is 115643831. The reversal of 115643811 is 118346511.

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

It is not a de Polignac number, because 115643811 - 2² = 115643807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115643831) 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, 19273966 + ... + 19273971.

It is an arithmetic number, because the mean of its divisors is an integer number (38547938).

Almost surely, 2^115643811 is an apocalyptic number.

115643811 is a deficient number, since it is larger than the sum of its proper divisors (38547941).

115643811 is an equidigital number, since it uses as much as digits as its factorization.

115643811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38547940.

The product of its digits is 2880, while the sum is 30.

The square root of 115643811 is about 10753.7812419632. The cubic root of 115643811 is about 487.2002080518.

The spelling of 115643811 in words is "one hundred fifteen million, six hundred forty-three thousand, eight hundred eleven".