9823194434872 has 128 divisors (see below), whose sum is σ = 23104114185600. Its totient is φ = 3811540082688.

The previous prime is 9823194434861. The next prime is 9823194434873. The reversal of 9823194434872 is 2784344913289.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9823194434873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123776388 + ... + 123855724.

It is an arithmetic number, because the mean of its divisors is an integer number (180500892075).

Almost surely, 2^{9823194434872} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9823194434872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11552057092800).

9823194434872 is an abundant number, since it is smaller than the sum of its proper divisors (13280919750728).

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

9823194434872 is a wasteful number, since it uses less digits than its factorization.

9823194434872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82625 (or 82621 counting only the distinct ones).

The product of its digits is 83607552, while the sum is 64.

The spelling of 9823194434872 in words is "nine trillion, eight hundred twenty-three billion, one hundred ninety-four million, four hundred thirty-four thousand, eight hundred seventy-two".