163989504000 has 1440 divisors, whose sum is σ = 714486269952. Its totient is φ = 35389440000.

The previous prime is 163989503963. The next prime is 163989504017. The reversal of 163989504000 is 405989361.

It is a happy number.

163989504000 is a `hidden beast` number, since 1 + 63 + 9 + 89 + 504 + 0 + 0 + 0 = 666.

163989504000 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3999743980 + ... + 3999744020.

Almost surely, 2^163989504000 is an apocalyptic number.

163989504000 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 163989504000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (357243134976).

163989504000 is an abundant number, since it is smaller than the sum of its proper divisors (550496765952).

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

163989504000 is an equidigital number, since it uses as much as digits as its factorization.

163989504000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The spelling of 163989504000 in words is "one hundred sixty-three billion, nine hundred eighty-nine million, five hundred four thousand".