12985563499 has 2 divisors, whose sum is σ = 12985563500. Its totient is φ = 12985563498.

The previous prime is 12985563497. The next prime is 12985563529. The reversal of 12985563499 is 99436558921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12985563499 - 2¹ = 12985563497 is a prime.

It is a super-2 number, since 2×12985563499² (a number of 21 digits) contains 22 as substring.

Together with 12985563497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12985563497) 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 as a sum of consecutive naturals, namely, 6492781749 + 6492781750.

It is an arithmetic number, because the mean of its divisors is an integer number (6492781750).

Almost surely, 2^12985563499 is an apocalyptic number.

12985563499 is a deficient number, since it is larger than the sum of its proper divisors (1).

12985563499 is an equidigital number, since it uses as much as digits as its factorization.

12985563499 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20995200, while the sum is 61.

The spelling of 12985563499 in words is "twelve billion, nine hundred eighty-five million, five hundred sixty-three thousand, four hundred ninety-nine".