12664625229 has 24 divisors (see below), whose sum is σ = 18823116312. Its totient is φ = 8201731200.

The previous prime is 12664625203. The next prime is 12664625243. The reversal of 12664625229 is 92252646621.

12664625229 is a `hidden beast` number, since 1 + 2 + 6 + 64 + 62 + 522 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2735499204 + 9929126025 = 52302^2 + 99645^2 .

It is not a de Polignac number, because 12664625229 - 2⁹ = 12664624717 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664625279) 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, 83262 + ... + 179615.

It is an arithmetic number, because the mean of its divisors is an integer number (784296513).

Almost surely, 2^12664625229 is an apocalyptic number.

It is an amenable number.

12664625229 is a deficient number, since it is larger than the sum of its proper divisors (6158491083).

12664625229 is a wasteful number, since it uses less digits than its factorization.

12664625229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263037 (or 263034 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The spelling of 12664625229 in words is "twelve billion, six hundred sixty-four million, six hundred twenty-five thousand, two hundred twenty-nine".