12311397852 has 72 divisors (see below), whose sum is σ = 32743589760. Its totient is φ = 3588736320.

The previous prime is 12311397829. The next prime is 12311397859. The reversal of 12311397852 is 25879311321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311397859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121224 + ... + 198287.

It is an arithmetic number, because the mean of its divisors is an integer number (454772080).

Almost surely, 2^12311397852 is an apocalyptic number.

12311397852 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12311397852 is an abundant number, since it is smaller than the sum of its proper divisors (20432191908).

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

12311397852 is a wasteful number, since it uses less digits than its factorization.

12311397852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319563 (or 319548 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The spelling of 12311397852 in words is "twelve billion, three hundred eleven million, three hundred ninety-seven thousand, eight hundred fifty-two".