12399265008 has 180 divisors, whose sum is σ = 37859786640. Its totient is φ = 3786292224.

The previous prime is 12399265001. The next prime is 12399265009. The reversal of 12399265008 is 80056299321.

It is a super-2 number, since 2×12399265008² (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 (12399265001) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3332173 + ... + 3335891.

It is an arithmetic number, because the mean of its divisors is an integer number (210332148).

Almost surely, 2^12399265008 is an apocalyptic number.

12399265008 is a gapful number since it is divisible by the number (18) 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 12399265008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18929893320).

12399265008 is an abundant number, since it is smaller than the sum of its proper divisors (25460521632).

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

12399265008 is a wasteful number, since it uses less digits than its factorization.

12399265008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3896 (or 3874 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 12399265008 in words is "twelve billion, three hundred ninety-nine million, two hundred sixty-five thousand, eight".