326981220492 has 54 divisors (see below), whose sum is σ = 797681594388. Its totient is φ = 104240355648.

The previous prime is 326981220457. The next prime is 326981220509. The reversal of 326981220492 is 294022189623.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 45556008 + ... + 45563184.

Almost surely, 2^326981220492 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 326981220492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398840797194).

326981220492 is an abundant number, since it is smaller than the sum of its proper divisors (470700373896).

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

326981220492 is an frugal number, since it uses more digits than its factorization.

326981220492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14407 (or 7205 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

Multiplying 326981220492 by its sum of digits (48), we get a square (15695098583616 = 3961704²).

The spelling of 326981220492 in words is "three hundred twenty-six billion, nine hundred eighty-one million, two hundred twenty thousand, four hundred ninety-two".