12396543867840 has 224 divisors, whose sum is σ = 43174348439040. Its totient is φ = 2988618854400.

The previous prime is 12396543867781. The next prime is 12396543867847. The reversal of 12396543867840 is 4876834569321.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12396543867847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1331500 + ... + 5154219.

It is an arithmetic number, because the mean of its divisors is an integer number (192742626960).

It is a 1-persistent number, because it is pandigital, but 2⋅12396543867840 = 24793087735680 is not.

Almost surely, 2^{12396543867840} is an apocalyptic number.

12396543867840 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 12396543867840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21587174219520).

12396543867840 is an abundant number, since it is smaller than the sum of its proper divisors (30777804571200).

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

12396543867840 is a wasteful number, since it uses less digits than its factorization.

12396543867840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6485931 (or 6485921 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 66.

The spelling of 12396543867840 in words is "twelve trillion, three hundred ninety-six billion, five hundred forty-three million, eight hundred sixty-seven thousand, eight hundred forty".