163723855680 has 1344 divisors, whose sum is σ = 751187354112. Its totient is φ = 31685345280.

The previous prime is 163723855637. The next prime is 163723855769. The reversal of 163723855680 is 86558327361.

163723855680 is a `hidden beast` number, since 1 + 6 + 3 + 7 + 2 + 3 + 8 + 556 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (1344).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 516478882 + ... + 516479198.

Almost surely, 2^163723855680 is an apocalyptic number.

163723855680 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 163723855680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375593677056).

163723855680 is an abundant number, since it is smaller than the sum of its proper divisors (587463498432).

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

163723855680 is a wasteful number, since it uses less digits than its factorization.

163723855680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 54.

The spelling of 163723855680 in words is "one hundred sixty-three billion, seven hundred twenty-three million, eight hundred fifty-five thousand, six hundred eighty".