11680557220 has 12 divisors (see below), whose sum is σ = 24529170204. Its totient is φ = 4672222880.

The previous prime is 11680557169. The next prime is 11680557221. The reversal of 11680557220 is 2275508611.

It can be written as a sum of positive squares in 2 ways, for example, as 7330099456 + 4350457764 = 85616^2 + 65958^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11680557220.

It is not an unprimeable number, because it can be changed into a prime (11680557221) 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, 292013911 + ... + 292013950.

It is an arithmetic number, because the mean of its divisors is an integer number (2044097517).

Almost surely, 2^11680557220 is an apocalyptic number.

11680557220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11680557220 is an abundant number, since it is smaller than the sum of its proper divisors (12848612984).

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

11680557220 is a wasteful number, since it uses less digits than its factorization.

11680557220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584027870 (or 584027868 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 37.

The spelling of 11680557220 in words is "eleven billion, six hundred eighty million, five hundred fifty-seven thousand, two hundred twenty".