1989108822432 has 24 divisors (see below), whose sum is σ = 5221410659136. Its totient is φ = 663036274112.

The previous prime is 1989108822419. The next prime is 1989108822439. The reversal of 1989108822432 is 2342288019891.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1989108822439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10359941688 + ... + 10359941879.

It is an arithmetic number, because the mean of its divisors is an integer number (217558777464).

Almost surely, 2^{1989108822432} is an apocalyptic number.

1989108822432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1989108822432 is an abundant number, since it is smaller than the sum of its proper divisors (3232301836704).

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

1989108822432 is a wasteful number, since it uses less digits than its factorization.

1989108822432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20719883580 (or 20719883572 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 57.

The spelling of 1989108822432 in words is "one trillion, nine hundred eighty-nine billion, one hundred eight million, eight hundred twenty-two thousand, four hundred thirty-two".