9983172644 has 24 divisors (see below), whose sum is σ = 18101905920. Its totient is φ = 4814392544.

The previous prime is 9983172613. The next prime is 9983172707. The reversal of 9983172644 is 4462713899.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386564 + ... + 411579.

It is an arithmetic number, because the mean of its divisors is an integer number (754246080).

Almost surely, 2^9983172644 is an apocalyptic number.

It is an amenable number.

9983172644 is a deficient number, since it is larger than the sum of its proper divisors (8118733276).

9983172644 is a wasteful number, since it uses less digits than its factorization.

9983172644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798259 (or 798257 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 53.

The square root of 9983172644 is about 99915.8277951997. The cubic root of 9983172644 is about 2153.2255635811.

The spelling of 9983172644 in words is "nine billion, nine hundred eighty-three million, one hundred seventy-two thousand, six hundred forty-four".