9985861976836 has 24 divisors (see below), whose sum is σ = 17633460136320. Its totient is φ = 4947748321152.

The previous prime is 9985861976803. The next prime is 9985861976887. The reversal of 9985861976836 is 6386791685899.

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, 21145 + ... + 4469023.

It is an arithmetic number, because the mean of its divisors is an integer number (734727505680).

Almost surely, 2^{9985861976836} is an apocalyptic number.

It is an amenable number.

9985861976836 is a deficient number, since it is larger than the sum of its proper divisors (7647598159484).

9985861976836 is a wasteful number, since it uses less digits than its factorization.

9985861976836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4452963 (or 4452961 counting only the distinct ones).

The product of its digits is 8465264640, while the sum is 85.

The spelling of 9985861976836 in words is "nine trillion, nine hundred eighty-five billion, eight hundred sixty-one million, nine hundred seventy-six thousand, eight hundred thirty-six".