1163115011 has 4 divisors (see below), whose sum is σ = 1163200800. Its totient is φ = 1163029224.

The previous prime is 1163115007. The next prime is 1163115029. The reversal of 1163115011 is 1105113611.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1163115011 - 2² = 1163115007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1163115311) 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, 17576 + ... + 51333.

It is an arithmetic number, because the mean of its divisors is an integer number (290800200).

Almost surely, 2^1163115011 is an apocalyptic number.

1163115011 is a deficient number, since it is larger than the sum of its proper divisors (85789).

1163115011 is an equidigital number, since it uses as much as digits as its factorization.

1163115011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85788.

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 1163115011 is about 34104.4720088143. The cubic root of 1163115011 is about 1051.6572502017.

Adding to 1163115011 its reverse (1105113611), we get a palindrome (2268228622).

The spelling of 1163115011 in words is "one billion, one hundred sixty-three million, one hundred fifteen thousand, eleven".