319853644321 has 2 divisors, whose sum is σ = 319853644322. Its totient is φ = 319853644320.

The previous prime is 319853644309. The next prime is 319853644349. The reversal of 319853644321 is 123446358913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309180481600 + 10673162721 = 556040^2 + 103311^2 .

It is a cyclic number.

It is not a de Polignac number, because 319853644321 - 2¹³ = 319853636129 is a prime.

It is not a weakly prime, because it can be changed into another prime (319853644381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159926822160 + 159926822161.

It is an arithmetic number, because the mean of its divisors is an integer number (159926822161).

Almost surely, 2^319853644321 is an apocalyptic number.

It is an amenable number.

319853644321 is a deficient number, since it is larger than the sum of its proper divisors (1).

319853644321 is an equidigital number, since it uses as much as digits as its factorization.

319853644321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1866240, while the sum is 49.

The spelling of 319853644321 in words is "three hundred nineteen billion, eight hundred fifty-three million, six hundred forty-four thousand, three hundred twenty-one".