326171220400 has 180 divisors, whose sum is σ = 803475839880. Its totient is φ = 127243212800.

The previous prime is 326171220383. The next prime is 326171220437. The reversal of 326171220400 is 4022171623.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 370227960 + ... + 370228840.

It is an arithmetic number, because the mean of its divisors is an integer number (4463754666).

Almost surely, 2^326171220400 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 326171220400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (401737919940).

326171220400 is an abundant number, since it is smaller than the sum of its proper divisors (477304619480).

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

326171220400 is a wasteful number, since it uses less digits than its factorization.

326171220400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412 (or 1354 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The spelling of 326171220400 in words is "three hundred twenty-six billion, one hundred seventy-one million, two hundred twenty thousand, four hundred".