12399707868 has 24 divisors (see below), whose sum is σ = 29069779200. Its totient is φ = 4113646320.

The previous prime is 12399707861. The next prime is 12399707923. The reversal of 12399707868 is 86870799321.

It is a super-2 number, since 2×12399707868² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12399707861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2446068 + ... + 2451131.

It is an arithmetic number, because the mean of its divisors is an integer number (1211240800).

Almost surely, 2^12399707868 is an apocalyptic number.

It is an amenable number.

12399707868 is an abundant number, since it is smaller than the sum of its proper divisors (16670071332).

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

12399707868 is a wasteful number, since it uses less digits than its factorization.

12399707868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4897417 (or 4897415 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 60.

The spelling of 12399707868 in words is "twelve billion, three hundred ninety-nine million, seven hundred seven thousand, eight hundred sixty-eight".