11228945557 has 4 divisors (see below), whose sum is σ = 11229232960. Its totient is φ = 11228658156.

The previous prime is 11228945531. The next prime is 11228945593. The reversal of 11228945557 is 75554982211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11228945557 - 2¹⁵ = 11228912789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11228945557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11228915557) 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, 73743 + ... + 167020.

It is an arithmetic number, because the mean of its divisors is an integer number (2807308240).

Almost surely, 2^11228945557 is an apocalyptic number.

It is an amenable number.

11228945557 is a deficient number, since it is larger than the sum of its proper divisors (287403).

11228945557 is an equidigital number, since it uses as much as digits as its factorization.

11228945557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287402.

The product of its digits is 1008000, while the sum is 49.

The spelling of 11228945557 in words is "eleven billion, two hundred twenty-eight million, nine hundred forty-five thousand, five hundred fifty-seven".