12650810642 has 4 divisors (see below), whose sum is σ = 18976215966. Its totient is φ = 6325405320.

The previous prime is 12650810633. The next prime is 12650810663. The reversal of 12650810642 is 24601805621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24601805621 = 241 ⋅102082181.

It can be written as a sum of positive squares in only one way, i.e., 6947389201 + 5703421441 = 83351^2 + 75521^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3162702659 + ... + 3162702662.

Almost surely, 2^12650810642 is an apocalyptic number.

12650810642 is a deficient number, since it is larger than the sum of its proper divisors (6325405324).

12650810642 is an equidigital number, since it uses as much as digits as its factorization.

12650810642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6325405323.

The product of its (nonzero) digits is 23040, while the sum is 35.

The spelling of 12650810642 in words is "twelve billion, six hundred fifty million, eight hundred ten thousand, six hundred forty-two".