319920717851 has 16 divisors (see below), whose sum is σ = 370675183104. Its totient is φ = 270430000704.

The previous prime is 319920717841. The next prime is 319920717911. The reversal of 319920717851 is 158717029913.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 319920717851 - 2¹⁰ = 319920716827 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 319920717793 and 319920717802.

It is not an unprimeable number, because it can be changed into a prime (319920717811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5082296 + ... + 5144858.

It is an arithmetic number, because the mean of its divisors is an integer number (23167198944).

Almost surely, 2^319920717851 is an apocalyptic number.

319920717851 is a deficient number, since it is larger than the sum of its proper divisors (50754465253).

319920717851 is a wasteful number, since it uses less digits than its factorization.

319920717851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72650.

The product of its (nonzero) digits is 952560, while the sum is 53.

The spelling of 319920717851 in words is "three hundred nineteen billion, nine hundred twenty million, seven hundred seventeen thousand, eight hundred fifty-one".