11571055220 has 48 divisors (see below), whose sum is σ = 24822443520. Its totient is φ = 4529467776.

The previous prime is 11571055189. The next prime is 11571055267. The reversal of 11571055220 is 2255017511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241154 + ... + 285126.

It is an arithmetic number, because the mean of its divisors is an integer number (517134240).

Almost surely, 2^11571055220 is an apocalyptic number.

11571055220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11571055220 is an abundant number, since it is smaller than the sum of its proper divisors (13251388300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11571055220 is a wasteful number, since it uses less digits than its factorization.

11571055220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44264 (or 44262 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 29.

The spelling of 11571055220 in words is "eleven billion, five hundred seventy-one million, fifty-five thousand, two hundred twenty".