163646312120532 has 36 divisors (see below), whose sum is σ = 413928562019700. Its totient is φ = 54513555213312.

The previous prime is 163646312120521. The next prime is 163646312120539. The reversal of 163646312120532 is 235021213646361.

163646312120532 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 4 + 631 + 2 + 1 + 2 + 0 + 5 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24860854156356 + 138785457964176 = 4986066^2 + 11780724^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163646312120539) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1467255693 + ... + 1467367220.

Almost surely, 2^{163646312120532} is an apocalyptic number.

163646312120532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

163646312120532 is an abundant number, since it is smaller than the sum of its proper divisors (250282249899168).

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

163646312120532 is a wasteful number, since it uses less digits than its factorization.

163646312120532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934624472 (or 2934624467 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 45.

Adding to 163646312120532 its reverse (235021213646361), we get a palindrome (398667525766893).

The spelling of 163646312120532 in words is "one hundred sixty-three trillion, six hundred forty-six billion, three hundred twelve million, one hundred twenty thousand, five hundred thirty-two".