12643066625 has 32 divisors (see below), whose sum is σ = 18043014912. Its totient is φ = 8664537600.

The previous prime is 12643066613. The next prime is 12643066637. The reversal of 12643066625 is 52666034621.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12643066613) and next prime (12643066637).

It is not a de Polignac number, because 12643066625 - 2⁴ = 12643066609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2155697 + ... + 2161553.

It is an arithmetic number, because the mean of its divisors is an integer number (563844216).

Almost surely, 2^12643066625 is an apocalyptic number.

It is an amenable number.

12643066625 is a deficient number, since it is larger than the sum of its proper divisors (5399948287).

12643066625 is an equidigital number, since it uses as much as digits as its factorization.

12643066625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346 (or 8336 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 41.

The spelling of 12643066625 in words is "twelve billion, six hundred forty-three million, sixty-six thousand, six hundred twenty-five".