12818377664 has 56 divisors (see below), whose sum is σ = 27939431040. Its totient is φ = 5807856384.

The previous prime is 12818377651. The next prime is 12818377681. The reversal of 12818377664 is 46677381821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201194 + ... + 257129.

Almost surely, 2^12818377664 is an apocalyptic number.

It is an amenable number.

12818377664 is an abundant number, since it is smaller than the sum of its proper divisors (15121053376).

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

12818377664 is a wasteful number, since it uses less digits than its factorization.

12818377664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458377 (or 458367 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The spelling of 12818377664 in words is "twelve billion, eight hundred eighteen million, three hundred seventy-seven thousand, six hundred sixty-four".