168222891313 has 2 divisors, whose sum is σ = 168222891314. Its totient is φ = 168222891312.

The previous prime is 168222891307. The next prime is 168222891359. The reversal of 168222891313 is 313198222861.

It is an a-pointer prime, because the next prime (168222891359) can be obtained adding 168222891313 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128025849249 + 40197042064 = 357807^2 + 200492^2 .

It is a cyclic number.

It is not a de Polignac number, because 168222891313 - 2¹⁷ = 168222760241 is a prime.

It is not a weakly prime, because it can be changed into another prime (168222891113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84111445656 + 84111445657.

It is an arithmetic number, because the mean of its divisors is an integer number (84111445657).

Almost surely, 2^168222891313 is an apocalyptic number.

It is an amenable number.

168222891313 is a deficient number, since it is larger than the sum of its proper divisors (1).

168222891313 is an equidigital number, since it uses as much as digits as its factorization.

168222891313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The spelling of 168222891313 in words is "one hundred sixty-eight billion, two hundred twenty-two million, eight hundred ninety-one thousand, three hundred thirteen".