11551228481191 has 24 divisors (see below), whose sum is σ = 13798222909296. Its totient is φ = 9638341009920.

The previous prime is 11551228481159. The next prime is 11551228481201. The reversal of 11551228481191 is 19118482215511.

It is not a de Polignac number, because 11551228481191 - 2⁵ = 11551228481159 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551228481791) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19630581 + ... + 20210446.

It is an arithmetic number, because the mean of its divisors is an integer number (574925954554).

Almost surely, 2^{11551228481191} is an apocalyptic number.

11551228481191 is a deficient number, since it is larger than the sum of its proper divisors (2246994428105).

11551228481191 is an equidigital number, since it uses as much as digits as its factorization.

11551228481191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39841199 (or 39841192 counting only the distinct ones).

The product of its digits is 230400, while the sum is 49.

The spelling of 11551228481191 in words is "eleven trillion, five hundred fifty-one billion, two hundred twenty-eight million, four hundred eighty-one thousand, one hundred ninety-one".