319685721234 has 64 divisors (see below), whose sum is σ = 706362619392. Its totient is φ = 96447154320.

The previous prime is 319685721217. The next prime is 319685721241. The reversal of 319685721234 is 432127586913.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1724649 + ... + 1900995.

It is an arithmetic number, because the mean of its divisors is an integer number (11036915928).

Almost surely, 2^319685721234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 319685721234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353181309696).

319685721234 is an abundant number, since it is smaller than the sum of its proper divisors (386676898158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

319685721234 is a wasteful number, since it uses less digits than its factorization.

319685721234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176612 (or 176590 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 51.

The spelling of 319685721234 in words is "three hundred nineteen billion, six hundred eighty-five million, seven hundred twenty-one thousand, two hundred thirty-four".