12645562775 has 24 divisors (see below), whose sum is σ = 15927172560. Its totient is φ = 9958319360.

The previous prime is 12645562739. The next prime is 12645562777. The reversal of 12645562775 is 57726554621.

It is a de Polignac number, because none of the positive numbers 2^k-12645562775 is a prime.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12645562777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 492557 + ... + 517593.

It is an arithmetic number, because the mean of its divisors is an integer number (663632190).

Almost surely, 2^12645562775 is an apocalyptic number.

12645562775 is a deficient number, since it is larger than the sum of its proper divisors (3281609785).

12645562775 is a wasteful number, since it uses less digits than its factorization.

12645562775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25363 (or 25358 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 50.

The spelling of 12645562775 in words is "twelve billion, six hundred forty-five million, five hundred sixty-two thousand, seven hundred seventy-five".