12195836400 has 240 divisors, whose sum is σ = 43772519808. Its totient is φ = 2876544000.

The previous prime is 12195836381. The next prime is 12195836423. The reversal of 12195836400 is 463859121.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

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, 475915 + ... + 500885.

Almost surely, 2^12195836400 is an apocalyptic number.

12195836400 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 12195836400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21886259904).

12195836400 is an abundant number, since it is smaller than the sum of its proper divisors (31576683408).

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

12195836400 is a wasteful number, since it uses less digits than its factorization.

12195836400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25040 (or 25029 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 12195836400 in words is "twelve billion, one hundred ninety-five million, eight hundred thirty-six thousand, four hundred".