12643251650 has 24 divisors (see below), whose sum is σ = 23526210000. Its totient is φ = 5055201360.

The previous prime is 12643251629. The next prime is 12643251661. The reversal of 12643251650 is 5615234621.

12643251650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12643251650.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 72101 + ... + 174599.

It is an arithmetic number, because the mean of its divisors is an integer number (980258750).

Almost surely, 2^12643251650 is an apocalyptic number.

12643251650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12643251650 is a deficient number, since it is larger than the sum of its proper divisors (10882958350).

12643251650 is a wasteful number, since it uses less digits than its factorization.

12643251650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104978 (or 104973 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 35.

The spelling of 12643251650 in words is "twelve billion, six hundred forty-three million, two hundred fifty-one thousand, six hundred fifty".