12257118500 has 144 divisors (see below), whose sum is σ = 30975934080. Its totient is φ = 4222152000.

The previous prime is 12257118493. The next prime is 12257118529. The reversal of 12257118500 is 581175221.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1144169 + ... + 1154831.

Almost surely, 2^12257118500 is an apocalyptic number.

12257118500 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 12257118500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15487967040).

12257118500 is an abundant number, since it is smaller than the sum of its proper divisors (18718815580).

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

12257118500 is a wasteful number, since it uses less digits than its factorization.

12257118500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10723 (or 10700 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 32.

The spelling of 12257118500 in words is "twelve billion, two hundred fifty-seven million, one hundred eighteen thousand, five hundred".