326458991040 has 448 divisors, whose sum is σ = 1342850288640. Its totient is φ = 65253703680.

The previous prime is 326458991009. The next prime is 326458991041. The reversal of 326458991040 is 40199854623.

It is a tau number, because it is divible by the number of its divisors (448).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (326458991041) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1561500 + ... + 1758180.

It is an arithmetic number, because the mean of its divisors is an integer number (2997433680).

Almost surely, 2^326458991040 is an apocalyptic number.

326458991040 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 326458991040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (671425144320).

326458991040 is an abundant number, since it is smaller than the sum of its proper divisors (1016391297600).

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

326458991040 is a wasteful number, since it uses less digits than its factorization.

326458991040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196740 (or 196730 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 51.

The spelling of 326458991040 in words is "three hundred twenty-six billion, four hundred fifty-eight million, nine hundred ninety-one thousand, forty".