163125305520 has 80 divisors (see below), whose sum is σ = 506323530720. Its totient is φ = 43445450752.

The previous prime is 163125305503. The next prime is 163125305521. The reversal of 163125305520 is 25503521361.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (163125305521) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 235125 + ... + 617684.

It is an arithmetic number, because the mean of its divisors is an integer number (6329044134).

Almost surely, 2^163125305520 is an apocalyptic number.

163125305520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163125305520 is an abundant number, since it is smaller than the sum of its proper divisors (343198225200).

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

163125305520 is a wasteful number, since it uses less digits than its factorization.

163125305520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 853622 (or 853616 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 33.

Adding to 163125305520 its reverse (25503521361), we get a palindrome (188628826881).

The spelling of 163125305520 in words is "one hundred sixty-three billion, one hundred twenty-five million, three hundred five thousand, five hundred twenty".