12311164140 has 96 divisors (see below), whose sum is σ = 37950232320. Its totient is φ = 2957126400.

The previous prime is 12311164139. The next prime is 12311164147. The reversal of 12311164140 is 4146111321.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12311164140.

It is not an unprimeable number, because it can be changed into a prime (12311164147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13626 + ... + 157505.

It is an arithmetic number, because the mean of its divisors is an integer number (395314920).

Almost surely, 2^12311164140 is an apocalyptic number.

12311164140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12311164140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18975116160).

12311164140 is an abundant number, since it is smaller than the sum of its proper divisors (25639068180).

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

12311164140 is a wasteful number, since it uses less digits than its factorization.

12311164140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171263 (or 171261 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

Adding to 12311164140 its reverse (4146111321), we get a palindrome (16457275461).

The spelling of 12311164140 in words is "twelve billion, three hundred eleven million, one hundred sixty-four thousand, one hundred forty".