326426343224640 has 224 divisors, whose sum is σ = 1049569141985280. Its totient is φ = 85941358503936.

The previous prime is 326426343224627. The next prime is 326426343224647. The reversal of 326426343224640 is 46422343624623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326426343224647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1985636527 + ... + 1985800913.

It is an arithmetic number, because the mean of its divisors is an integer number (4685576526720).

Almost surely, 2^{326426343224640} is an apocalyptic number.

326426343224640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 326426343224640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (524784570992640).

326426343224640 is an abundant number, since it is smaller than the sum of its proper divisors (723142798760640).

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

326426343224640 is a wasteful number, since it uses less digits than its factorization.

326426343224640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190669 (or 190659 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 51.

It can be divided in two parts, 3264263 and 43224640, that added together give a triangular number (46488903 = T₉₆₄₂).

The spelling of 326426343224640 in words is "three hundred twenty-six trillion, four hundred twenty-six billion, three hundred forty-three million, two hundred twenty-four thousand, six hundred forty".