12640596025 has 6 divisors (see below), whose sum is σ = 15674339102. Its totient is φ = 10112476800.

The previous prime is 12640595959. The next prime is 12640596029. The reversal of 12640596025 is 52069504621.

It can be written as a sum of positive squares in 3 ways, for example, as 279825984 + 12360770041 = 16728^2 + 111179^2 .

It is not a de Polignac number, because 12640596025 - 2¹⁷ = 12640464953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12640596029) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 252811896 + ... + 252811945.

Almost surely, 2^12640596025 is an apocalyptic number.

It is an amenable number.

12640596025 is a deficient number, since it is larger than the sum of its proper divisors (3033743077).

12640596025 is an equidigital number, since it uses as much as digits as its factorization.

12640596025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505623851 (or 505623846 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 12640596025 in words is "twelve billion, six hundred forty million, five hundred ninety-six thousand, twenty-five".