326131973440 has 896 divisors, whose sum is σ = 1030682419200. Its totient is φ = 97542144000.

The previous prime is 326131973429. The next prime is 326131973477. The reversal of 326131973440 is 44379131623.

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, 3229029390 + ... + 3229029490.

It is an arithmetic number, because the mean of its divisors is an integer number (1150315200).

Almost surely, 2^326131973440 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 326131973440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515341209600).

326131973440 is an abundant number, since it is smaller than the sum of its proper divisors (704550445760).

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

326131973440 is a wasteful number, since it uses less digits than its factorization.

326131973440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 43.

The spelling of 326131973440 in words is "three hundred twenty-six billion, one hundred thirty-one million, nine hundred seventy-three thousand, four hundred forty".