326856550464 has 168 divisors, whose sum is σ = 978470618112. Its totient is φ = 104123289600.

The previous prime is 326856550409. The next prime is 326856550529. The reversal of 326856550464 is 464055658623.

326856550464 is a `hidden beast` number, since 3 + 2 + 6 + 85 + 6 + 550 + 4 + 6 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 326856550464.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15900577 + ... + 15921119.

Almost surely, 2^326856550464 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 326856550464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (489235309056).

326856550464 is an abundant number, since it is smaller than the sum of its proper divisors (651614067648).

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

326856550464 is a wasteful number, since it uses less digits than its factorization.

326856550464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21785 (or 21772 counting only the distinct ones).

The product of its (nonzero) digits is 20736000, while the sum is 54.

The spelling of 326856550464 in words is "three hundred twenty-six billion, eight hundred fifty-six million, five hundred fifty thousand, four hundred sixty-four".