12099542400 has 768 divisors, whose sum is σ = 50086080000. Its totient is φ = 2825625600.

The previous prime is 12099542381. The next prime is 12099542407. The reversal of 12099542400 is 424599021.

12099542400 is a `hidden beast` number, since 1 + 20 + 99 + 542 + 4 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12099542407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27561381 + ... + 27561819.

It is an arithmetic number, because the mean of its divisors is an integer number (65216250).

Almost surely, 2^12099542400 is an apocalyptic number.

12099542400 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 12099542400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25043040000).

12099542400 is an abundant number, since it is smaller than the sum of its proper divisors (37986537600).

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

12099542400 is a wasteful number, since it uses less digits than its factorization.

12099542400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 12099542400 in words is "twelve billion, ninety-nine million, five hundred forty-two thousand, four hundred".