12787338872 has 32 divisors (see below), whose sum is σ = 29892481920. Its totient is φ = 4982079840.

The previous prime is 12787338857. The next prime is 12787338877. The reversal of 12787338872 is 27883378721.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12787338877) 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, 10378718 + ... + 10379949.

It is an arithmetic number, because the mean of its divisors is an integer number (934140060).

Almost surely, 2^12787338872 is an apocalyptic number.

It is an amenable number.

12787338872 is an abundant number, since it is smaller than the sum of its proper divisors (17105143048).

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

12787338872 is a wasteful number, since it uses less digits than its factorization.

12787338872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20758691 (or 20758687 counting only the distinct ones).

The product of its digits is 6322176, while the sum is 56.

The spelling of 12787338872 in words is "twelve billion, seven hundred eighty-seven million, three hundred thirty-eight thousand, eight hundred seventy-two".