12664142231 has 16 divisors (see below), whose sum is σ = 14444375904. Its totient is φ = 10999425024.

The previous prime is 12664142213. The next prime is 12664142233. The reversal of 12664142231 is 13224146621.

It is a cyclic number.

It is not a de Polignac number, because 12664142231 - 2⁶ = 12664142167 is a prime.

It is a super-2 number, since 2×12664142231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664142233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1661876 + ... + 1669478.

It is an arithmetic number, because the mean of its divisors is an integer number (902773494).

Almost surely, 2^12664142231 is an apocalyptic number.

12664142231 is a deficient number, since it is larger than the sum of its proper divisors (1780233673).

12664142231 is a wasteful number, since it uses less digits than its factorization.

12664142231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15170.

The product of its digits is 13824, while the sum is 32.

Adding to 12664142231 its reverse (13224146621), we get a palindrome (25888288852).

The spelling of 12664142231 in words is "twelve billion, six hundred sixty-four million, one hundred forty-two thousand, two hundred thirty-one".