1989019638060 has 768 divisors, whose sum is σ = 7362481029120. Its totient is φ = 389312593920.

The previous prime is 1989019638041. The next prime is 1989019638091. The reversal of 1989019638060 is 608369109891.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 1989019637985 and 1989019638003.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 2691501171 + ... + 2691501909.

It is an arithmetic number, because the mean of its divisors is an integer number (9586563840).

Almost surely, 2^{1989019638060} is an apocalyptic number.

1989019638060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1989019638060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3681240514560).

1989019638060 is an abundant number, since it is smaller than the sum of its proper divisors (5373461391060).

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

1989019638060 is a wasteful number, since it uses less digits than its factorization.

1989019638060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 60.

The spelling of 1989019638060 in words is "one trillion, nine hundred eighty-nine billion, nineteen million, six hundred thirty-eight thousand, sixty".