9986939646 has 16 divisors (see below), whose sum is σ = 21148813584. Its totient is φ = 3133157504.

The previous prime is 9986939579. The next prime is 9986939647. The reversal of 9986939646 is 6469396899.

9986939646 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986939647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48955485 + ... + 48955688.

It is an arithmetic number, because the mean of its divisors is an integer number (1321800849).

Almost surely, 2^9986939646 is an apocalyptic number.

9986939646 is an abundant number, since it is smaller than the sum of its proper divisors (11161873938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9986939646 is a wasteful number, since it uses less digits than its factorization.

9986939646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97911195.

The product of its digits is 136048896, while the sum is 69.

The square root of 9986939646 is about 99934.6768944594. The cubic root of 9986939646 is about 2153.4963587579.

The spelling of 9986939646 in words is "nine billion, nine hundred eighty-six million, nine hundred thirty-nine thousand, six hundred forty-six".