12397287864 has 64 divisors (see below), whose sum is σ = 33422860800. Its totient is φ = 3809344896.

The previous prime is 12397287863. The next prime is 12397287883. The reversal of 12397287864 is 46878279321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12397287863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205077 + ... + 258555.

It is an arithmetic number, because the mean of its divisors is an integer number (522232200).

Almost surely, 2^12397287864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12397287864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16711430400).

12397287864 is an abundant number, since it is smaller than the sum of its proper divisors (21025572936).

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

12397287864 is a wasteful number, since it uses less digits than its factorization.

12397287864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54244 (or 54240 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 57.

The spelling of 12397287864 in words is "twelve billion, three hundred ninety-seven million, two hundred eighty-seven thousand, eight hundred sixty-four".