1989148568159 has 8 divisors (see below), whose sum is σ = 1996063422192. Its totient is φ = 1982234571520.

The previous prime is 1989148568137. The next prime is 1989148568201. The reversal of 1989148568159 is 9518658419891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1989148568159 - 2⁴⁰ = 889636940383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1989148538159) 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, 4622972 + ... + 5034894.

It is an arithmetic number, because the mean of its divisors is an integer number (249507927774).

Almost surely, 2^{1989148568159} is an apocalyptic number.

1989148568159 is a deficient number, since it is larger than the sum of its proper divisors (6914854033).

1989148568159 is a wasteful number, since it uses less digits than its factorization.

1989148568159 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428697.

The product of its digits is 223948800, while the sum is 74.

The spelling of 1989148568159 in words is "one trillion, nine hundred eighty-nine billion, one hundred forty-eight million, five hundred sixty-eight thousand, one hundred fifty-nine".