1989159516400 has 120 divisors (see below), whose sum is σ = 5551199647904. Its totient is φ = 670817203200.

The previous prime is 1989159516361. The next prime is 1989159516433. The reversal of 1989159516400 is 46159519891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5652267 + ... + 5993866.

Almost surely, 2^{1989159516400} is an apocalyptic number.

1989159516400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1989159516400 is an abundant number, since it is smaller than the sum of its proper divisors (3562040131504).

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

1989159516400 is a wasteful number, since it uses less digits than its factorization.

1989159516400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11646219 (or 11646208 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 58.

The spelling of 1989159516400 in words is "one trillion, nine hundred eighty-nine billion, one hundred fifty-nine million, five hundred sixteen thousand, four hundred".