163573693920 has 1440 divisors, whose sum is σ = 732814967808. Its totient is φ = 33629147136.

The previous prime is 163573693903. The next prime is 163573693961. The reversal of 163573693920 is 29396375361.

163573693920 is a `hidden beast` number, since 1 + 6 + 3 + 573 + 69 + 3 + 9 + 2 + 0 = 666.

163573693920 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 (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 720588847 + ... + 720589073.

Almost surely, 2^163573693920 is an apocalyptic number.

163573693920 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 163573693920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366407483904).

163573693920 is an abundant number, since it is smaller than the sum of its proper divisors (569241273888).

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

163573693920 is a wasteful number, since it uses less digits than its factorization.

163573693920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 5511240, while the sum is 54.

The spelling of 163573693920 in words is "one hundred sixty-three billion, five hundred seventy-three million, six hundred ninety-three thousand, nine hundred twenty".