11158225991 has 16 divisors (see below), whose sum is σ = 12235829760. Its totient is φ = 10091292480.

The previous prime is 11158225987. The next prime is 11158225997. The reversal of 11158225991 is 19952285111.

It is a cyclic number.

It is not a de Polignac number, because 11158225991 - 2² = 11158225987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11158225997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1918610 + ... + 1924416.

It is an arithmetic number, because the mean of its divisors is an integer number (764739360).

Almost surely, 2^11158225991 is an apocalyptic number.

11158225991 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11158225991 is a deficient number, since it is larger than the sum of its proper divisors (1077603769).

11158225991 is a wasteful number, since it uses less digits than its factorization.

11158225991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6694.

The product of its digits is 64800, while the sum is 44.

The spelling of 11158225991 in words is "eleven billion, one hundred fifty-eight million, two hundred twenty-five thousand, nine hundred ninety-one".