12156824400 has 120 divisors (see below), whose sum is σ = 44505585984. Its totient is φ = 2778700800.

The previous prime is 12156824347. The next prime is 12156824413. The reversal of 12156824400 is 442865121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 715221 + ... + 732020.

Almost surely, 2^12156824400 is an apocalyptic number.

12156824400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12156824400 is an abundant number, since it is smaller than the sum of its proper divisors (32348761584).

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

12156824400 is a wasteful number, since it uses less digits than its factorization.

12156824400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447269 (or 1447258 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The spelling of 12156824400 in words is "twelve billion, one hundred fifty-six million, eight hundred twenty-four thousand, four hundred".