323173203268261 has 16 divisors (see below), whose sum is σ = 328502258164080. Its totient is φ = 317868826176000.

The previous prime is 323173203268243. The next prime is 323173203268351. The reversal of 323173203268261 is 162862302371323.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 94026087857025 + 229147115411236 = 9696705^2 + 15137606^2 .

It is a cyclic number.

It is not a de Polignac number, because 323173203268261 - 2¹⁷ = 323173203137189 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 (323173203266261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155177491 + ... + 157246303.

It is an arithmetic number, because the mean of its divisors is an integer number (20531391135255).

Almost surely, 2^{323173203268261} is an apocalyptic number.

It is an amenable number.

323173203268261 is a deficient number, since it is larger than the sum of its proper divisors (5329054895819).

323173203268261 is a wasteful number, since it uses less digits than its factorization.

323173203268261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2074776.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 323173203268261 in words is "three hundred twenty-three trillion, one hundred seventy-three billion, two hundred three million, two hundred sixty-eight thousand, two hundred sixty-one".