12645771816626 has 16 divisors (see below), whose sum is σ = 20715500530368. Its totient is φ = 5754305701200.

The previous prime is 12645771816617. The next prime is 12645771816637. The reversal of 12645771816626 is 62661817754621.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3425180120 + ... + 3425183811.

It is an arithmetic number, because the mean of its divisors is an integer number (1294718783148).

Almost surely, 2^{12645771816626} is an apocalyptic number.

12645771816626 is a deficient number, since it is larger than the sum of its proper divisors (8069728713742).

12645771816626 is a wasteful number, since it uses less digits than its factorization.

12645771816626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6850364017.

The product of its digits is 40642560, while the sum is 62.

The spelling of 12645771816626 in words is "twelve trillion, six hundred forty-five billion, seven hundred seventy-one million, eight hundred sixteen thousand, six hundred twenty-six".