12557485220 has 96 divisors (see below), whose sum is σ = 30976915200. Its totient is φ = 4186473984.

The previous prime is 12557485201. The next prime is 12557485231. The reversal of 12557485220 is 2258475521.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1374026 + ... + 1383134.

It is an arithmetic number, because the mean of its divisors is an integer number (322676200).

Almost surely, 2^12557485220 is an apocalyptic number.

12557485220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12557485220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15488457600).

12557485220 is an abundant number, since it is smaller than the sum of its proper divisors (18419429980).

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

12557485220 is a wasteful number, since it uses less digits than its factorization.

12557485220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9397 (or 9395 counting only the distinct ones).

The product of its (nonzero) digits is 224000, while the sum is 41.

The spelling of 12557485220 in words is "twelve billion, five hundred fifty-seven million, four hundred eighty-five thousand, two hundred twenty".