12665248528 has 10 divisors (see below), whose sum is σ = 24538919054. Its totient is φ = 6332624256.

The previous prime is 12665248499. The next prime is 12665248529. The reversal of 12665248528 is 82584256621.

It can be written as a sum of positive squares in only one way, i.e., 7543269904 + 5121978624 = 86852^2 + 71568^2 .

It is not an unprimeable number, because it can be changed into a prime (12665248529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 395789001 + ... + 395789032.

Almost surely, 2^12665248528 is an apocalyptic number.

It is an amenable number.

12665248528 is a deficient number, since it is larger than the sum of its proper divisors (11873670526).

12665248528 is an equidigital number, since it uses as much as digits as its factorization.

12665248528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791578041 (or 791578035 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 49.

The spelling of 12665248528 in words is "twelve billion, six hundred sixty-five million, two hundred forty-eight thousand, five hundred twenty-eight".