1989573558189 has 32 divisors (see below), whose sum is σ = 3216206361600. Its totient is φ = 1067976721152.

The previous prime is 1989573558187. The next prime is 1989573558197. The reversal of 1989573558189 is 9818553759891.

It is not a de Polignac number, because 1989573558189 - 2¹ = 1989573558187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989573558187) 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, 5141239 + ... + 5514660.

It is an arithmetic number, because the mean of its divisors is an integer number (100506448800).

Almost surely, 2^{1989573558189} is an apocalyptic number.

It is an amenable number.

1989573558189 is a deficient number, since it is larger than the sum of its proper divisors (1226632803411).

1989573558189 is a wasteful number, since it uses less digits than its factorization.

1989573558189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10656449.

The product of its digits is 979776000, while the sum is 78.

The spelling of 1989573558189 in words is "one trillion, nine hundred eighty-nine billion, five hundred seventy-three million, five hundred fifty-eight thousand, one hundred eighty-nine".