12387812864 has 80 divisors (see below), whose sum is σ = 28552601088. Its totient is φ = 5259282432.

The previous prime is 12387812863. The next prime is 12387812911. The reversal of 12387812864 is 46821878321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387812863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367337 + ... + 399639.

Almost surely, 2^12387812864 is an apocalyptic number.

12387812864 is a gapful number since it is divisible by the number (14) 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 12387812864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14276300544).

12387812864 is an abundant number, since it is smaller than the sum of its proper divisors (16164788224).

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

12387812864 is an equidigital number, since it uses as much as digits as its factorization.

12387812864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32435 (or 32419 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 50.

The spelling of 12387812864 in words is "twelve billion, three hundred eighty-seven million, eight hundred twelve thousand, eight hundred sixty-four".