163523105646221 has 8 divisors (see below), whose sum is σ = 165612134042880. Its totient is φ = 161434555141392.

The previous prime is 163523105646193. The next prime is 163523105646281. The reversal of 163523105646221 is 122646501325361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163523105646221 - 2³⁴ = 163505925777037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163523105646281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118784210 + ... + 120152963.

It is an arithmetic number, because the mean of its divisors is an integer number (20701516755360).

Almost surely, 2^{163523105646221} is an apocalyptic number.

It is an amenable number.

163523105646221 is a deficient number, since it is larger than the sum of its proper divisors (2089028396659).

163523105646221 is an equidigital number, since it uses as much as digits as its factorization.

163523105646221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238945915.

The product of its (nonzero) digits is 1555200, while the sum is 47.

The spelling of 163523105646221 in words is "one hundred sixty-three trillion, five hundred twenty-three billion, one hundred five million, six hundred forty-six thousand, two hundred twenty-one".