164521436324353 has 4 divisors (see below), whose sum is σ = 165239870544340. Its totient is φ = 163803002104368.

The previous prime is 164521436324261. The next prime is 164521436324407. The reversal of 164521436324353 is 353423634125461.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75522061457649 + 88999374866704 = 8690343^2 + 9433948^2 .

It is a cyclic number.

It is not a de Polignac number, because 164521436324353 - 2⁹ = 164521436323841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 164521436324353.

It is not an unprimeable number, because it can be changed into a prime (164521436324053) 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 3 ways as a sum of consecutive naturals, for example, 359217109650 + ... + 359217110107.

It is an arithmetic number, because the mean of its divisors is an integer number (41309967636085).

Almost surely, 2^{164521436324353} is an apocalyptic number.

It is an amenable number.

164521436324353 is a deficient number, since it is larger than the sum of its proper divisors (718434219987).

164521436324353 is an equidigital number, since it uses as much as digits as its factorization.

164521436324353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718434219986.

The product of its digits is 18662400, while the sum is 52.

The spelling of 164521436324353 in words is "one hundred sixty-four trillion, five hundred twenty-one billion, four hundred thirty-six million, three hundred twenty-four thousand, three hundred fifty-three".