12787838812 has 24 divisors (see below), whose sum is σ = 26921767040. Its totient is φ = 5192054640.

The previous prime is 12787838809. The next prime is 12787838813. The reversal of 12787838812 is 21883878721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787838813) 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, 12018114 + ... + 12019177.

Almost surely, 2^12787838812 is an apocalyptic number.

It is an amenable number.

12787838812 is an abundant number, since it is smaller than the sum of its proper divisors (14133928228).

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

12787838812 is a wasteful number, since it uses less digits than its factorization.

12787838812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24037321 (or 24037319 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 55.

The spelling of 12787838812 in words is "twelve billion, seven hundred eighty-seven million, eight hundred thirty-eight thousand, eight hundred twelve".