1989263155200 has 1344 divisors, whose sum is σ = 7488892108800. Its totient is φ = 463247769600.

The previous prime is 1989263155193. The next prime is 1989263155237. The reversal of 1989263155200 is 25513629891.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8323276681 + ... + 8323276919.

Almost surely, 2^{1989263155200} is an apocalyptic number.

1989263155200 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 1989263155200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3744446054400).

1989263155200 is an abundant number, since it is smaller than the sum of its proper divisors (5499628953600).

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

1989263155200 is a wasteful number, since it uses less digits than its factorization.

1989263155200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 322 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 51.

The spelling of 1989263155200 in words is "one trillion, nine hundred eighty-nine billion, two hundred sixty-three million, one hundred fifty-five thousand, two hundred".