319857817899 has 4 divisors (see below), whose sum is σ = 426477090536. Its totient is φ = 213238545264.

The previous prime is 319857817897. The next prime is 319857817987. The reversal of 319857817899 is 998718758913.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 319857817899 - 2¹ = 319857817897 is a prime.

It is a super-2 number, since 2×319857817899² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 319857817899.

It is not an unprimeable number, because it can be changed into a prime (319857817891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53309636314 + ... + 53309636319.

It is an arithmetic number, because the mean of its divisors is an integer number (106619272634).

Almost surely, 2^319857817899 is an apocalyptic number.

319857817899 is a deficient number, since it is larger than the sum of its proper divisors (106619272637).

319857817899 is a wasteful number, since it uses less digits than its factorization.

319857817899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106619272636.

The product of its digits is 274337280, while the sum is 75.

The spelling of 319857817899 in words is "three hundred nineteen billion, eight hundred fifty-seven million, eight hundred seventeen thousand, eight hundred ninety-nine".