325443532440 has 256 divisors, whose sum is σ = 1061212078080. Its totient is φ = 79367639040.

The previous prime is 325443532391. The next prime is 325443532483. The reversal of 325443532440 is 44235344523.

325443532440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 78361404 + ... + 78365556.

It is an arithmetic number, because the mean of its divisors is an integer number (4145359680).

Almost surely, 2^325443532440 is an apocalyptic number.

325443532440 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 325443532440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (530606039040).

325443532440 is an abundant number, since it is smaller than the sum of its proper divisors (735768545640).

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

325443532440 is a wasteful number, since it uses less digits than its factorization.

325443532440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4634 (or 4630 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 39.

Adding to 325443532440 its reverse (44235344523), we get a palindrome (369678876963).

The spelling of 325443532440 in words is "three hundred twenty-five billion, four hundred forty-three million, five hundred thirty-two thousand, four hundred forty".