163009566720 has 3072 divisors, whose sum is σ = 845365248000. Its totient is φ = 28665446400.

The previous prime is 163009566703. The next prime is 163009566757. The reversal of 163009566720 is 27665900361.

163009566720 is a `hidden beast` number, since 1 + 63 + 0 + 0 + 9 + 566 + 7 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (3072).

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 polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 5258373105 + ... + 5258373135.

It is an arithmetic number, because the mean of its divisors is an integer number (275184000).

Almost surely, 2^163009566720 is an apocalyptic number.

163009566720 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 163009566720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422682624000).

163009566720 is an abundant number, since it is smaller than the sum of its proper divisors (682355681280).

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

163009566720 is a wasteful number, since it uses less digits than its factorization.

163009566720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 163009566720 in words is "one hundred sixty-three billion, nine million, five hundred sixty-six thousand, seven hundred twenty".