12642565225 has 24 divisors (see below), whose sum is σ = 16439583960. Its totient is φ = 9631480320.

The previous prime is 12642565223. The next prime is 12642565237. The reversal of 12642565225 is 52256524621.

It can be written as a sum of positive squares in 12 ways, for example, as 2645764969 + 9996800256 = 51437^2 + 99984^2 .

It is not a de Polignac number, because 12642565225 - 2¹ = 12642565223 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12642565223) 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, 66514 + ... + 172363.

It is an arithmetic number, because the mean of its divisors is an integer number (684982665).

Almost surely, 2^12642565225 is an apocalyptic number.

It is an amenable number.

12642565225 is a deficient number, since it is larger than the sum of its proper divisors (3797018735).

12642565225 is a wasteful number, since it uses less digits than its factorization.

12642565225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238989 (or 238984 counting only the distinct ones).

The product of its digits is 288000, while the sum is 40.

The spelling of 12642565225 in words is "twelve billion, six hundred forty-two million, five hundred sixty-five thousand, two hundred twenty-five".