319253218616489 has 4 divisors (see below), whose sum is σ = 319596871167060. Its totient is φ = 318909566065920.

The previous prime is 319253218616417. The next prime is 319253218616509. The reversal of 319253218616489 is 984616812352913.

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 57354569958400 + 261898648658089 = 7573280^2 + 16183283^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319253218616489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (319253218516489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171826273892 + ... + 171826275749.

It is an arithmetic number, because the mean of its divisors is an integer number (79899217791765).

Almost surely, 2^{319253218616489} is an apocalyptic number.

It is an amenable number.

319253218616489 is a deficient number, since it is larger than the sum of its proper divisors (343652550571).

319253218616489 is an equidigital number, since it uses as much as digits as its factorization.

319253218616489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343652550570.

The product of its digits is 134369280, while the sum is 68.

The spelling of 319253218616489 in words is "three hundred nineteen trillion, two hundred fifty-three billion, two hundred eighteen million, six hundred sixteen thousand, four hundred eighty-nine".