12664051320 has 128 divisors (see below), whose sum is σ = 38646720000. Its totient is φ = 3319196160.

The previous prime is 12664051271. The next prime is 12664051327. The reversal of 12664051320 is 2315046621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664051327) 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, 2971351 + ... + 2975609.

It is an arithmetic number, because the mean of its divisors is an integer number (301927500).

Almost surely, 2^12664051320 is an apocalyptic number.

12664051320 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 12664051320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19323360000).

12664051320 is an abundant number, since it is smaller than the sum of its proper divisors (25982668680).

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

12664051320 is a wasteful number, since it uses less digits than its factorization.

12664051320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4693 (or 4689 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 12664051320 its reverse (2315046621), we get a palindrome (14979097941).

The spelling of 12664051320 in words is "twelve billion, six hundred sixty-four million, fifty-one thousand, three hundred twenty".