12811285936 has 20 divisors (see below), whose sum is σ = 25901078832. Its totient is φ = 6127136576.

The previous prime is 12811285889. The next prime is 12811285939. The reversal of 12811285936 is 63958211821.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is not an unprimeable number, because it can be changed into a prime (12811285939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17406271 + ... + 17407006.

Almost surely, 2^12811285936 is an apocalyptic number.

12811285936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12811285936 is an abundant number, since it is smaller than the sum of its proper divisors (13089792896).

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

12811285936 is a wasteful number, since it uses less digits than its factorization.

12811285936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34813308 (or 34813302 counting only the distinct ones).

The product of its digits is 207360, while the sum is 46.

The spelling of 12811285936 in words is "twelve billion, eight hundred eleven million, two hundred eighty-five thousand, nine hundred thirty-six".