12805185563 has 2 divisors, whose sum is σ = 12805185564. Its totient is φ = 12805185562.

The previous prime is 12805185557. The next prime is 12805185619. The reversal of 12805185563 is 36558150821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12805185563 - 2³² = 8510218267 is a prime.

It is not a weakly prime, because it can be changed into another prime (12805185763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402592781 + 6402592782.

It is an arithmetic number, because the mean of its divisors is an integer number (6402592782).

Almost surely, 2^12805185563 is an apocalyptic number.

12805185563 is a deficient number, since it is larger than the sum of its proper divisors (1).

12805185563 is an equidigital number, since it uses as much as digits as its factorization.

12805185563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 12805185563 in words is "twelve billion, eight hundred five million, one hundred eighty-five thousand, five hundred sixty-three".