12438327664 has 20 divisors (see below), whose sum is σ = 27542011504. Its totient is φ = 5330711808.

The previous prime is 12438327611. The next prime is 12438327677. The reversal of 12438327664 is 46672383421.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55528137 + ... + 55528360.

Almost surely, 2^12438327664 is an apocalyptic number.

12438327664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12438327664 is an abundant number, since it is smaller than the sum of its proper divisors (15103683840).

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

12438327664 is a wasteful number, since it uses less digits than its factorization.

12438327664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111056512 (or 111056506 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 46.

The spelling of 12438327664 in words is "twelve billion, four hundred thirty-eight million, three hundred twenty-seven thousand, six hundred sixty-four".