326166420235273 has 2 divisors, whose sum is σ = 326166420235274. Its totient is φ = 326166420235272.

The previous prime is 326166420235261. The next prime is 326166420235291. The reversal of 326166420235273 is 372532024661623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275916284689984 + 50250135545289 = 16610728^2 + 7088733^2 .

It is a cyclic number.

It is not a de Polignac number, because 326166420235273 - 2¹⁷ = 326166420104201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 326166420235273.

It is not a weakly prime, because it can be changed into another prime (326166420235213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163083210117636 + 163083210117637.

It is an arithmetic number, because the mean of its divisors is an integer number (163083210117637).

Almost surely, 2^{326166420235273} is an apocalyptic number.

It is an amenable number.

326166420235273 is a deficient number, since it is larger than the sum of its proper divisors (1).

326166420235273 is an equidigital number, since it uses as much as digits as its factorization.

326166420235273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 52.

Adding to 326166420235273 its reverse (372532024661623), we get a palindrome (698698444896896).

The spelling of 326166420235273 in words is "three hundred twenty-six trillion, one hundred sixty-six billion, four hundred twenty million, two hundred thirty-five thousand, two hundred seventy-three".