12215451600 has 360 divisors, whose sum is σ = 46424787552. Its totient is φ = 2949811200.

The previous prime is 12215451587. The next prime is 12215451629. The reversal of 12215451600 is 615451221.

12215451600 is a `hidden beast` number, since 1 + 2 + 2 + 1 + 5 + 4 + 51 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (360).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 14770387 + ... + 14771213.

Almost surely, 2^12215451600 is an apocalyptic number.

12215451600 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 12215451600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23212393776).

12215451600 is an abundant number, since it is smaller than the sum of its proper divisors (34209335952).

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

12215451600 is a wasteful number, since it uses less digits than its factorization.

12215451600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235 (or 1221 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 12215451600 in words is "twelve billion, two hundred fifteen million, four hundred fifty-one thousand, six hundred".