3985812563 has 4 divisors (see below), whose sum is σ = 3985940040. Its totient is φ = 3985685088.

The previous prime is 3985812559. The next prime is 3985812587. The reversal of 3985812563 is 3652185893.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3985812563 - 2² = 3985812559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3985812463) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18731 + ... + 91227.

It is an arithmetic number, because the mean of its divisors is an integer number (996485010).

Almost surely, 2^3985812563 is an apocalyptic number.

3985812563 is a deficient number, since it is larger than the sum of its proper divisors (127477).

3985812563 is an equidigital number, since it uses as much as digits as its factorization.

3985812563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127476.

The product of its digits is 1555200, while the sum is 50.

The square root of 3985812563 is about 63133.2920336014. The cubic root of 3985812563 is about 1585.5220660130.

The spelling of 3985812563 in words is "three billion, nine hundred eighty-five million, eight hundred twelve thousand, five hundred sixty-three".