319225549656 has 512 divisors, whose sum is σ = 944406650880. Its totient is φ = 89181388800.

The previous prime is 319225549649. The next prime is 319225549673. The reversal of 319225549656 is 656945522913.

It is a junction number, because it is equal to n+sod(n) for n = 319225549596 and 319225549605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1654018296 + ... + 1654018488.

It is an arithmetic number, because the mean of its divisors is an integer number (1844544240).

Almost surely, 2^319225549656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 319225549656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472203325440).

319225549656 is an abundant number, since it is smaller than the sum of its proper divisors (625181101224).

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

319225549656 is a wasteful number, since it uses less digits than its factorization.

319225549656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 423 counting only the distinct ones).

The product of its digits is 17496000, while the sum is 57.

The spelling of 319225549656 in words is "three hundred nineteen billion, two hundred twenty-five million, five hundred forty-nine thousand, six hundred fifty-six".