328542782523421 has 2 divisors, whose sum is σ = 328542782523422. Its totient is φ = 328542782523420.

The previous prime is 328542782523343. The next prime is 328542782523437. The reversal of 328542782523421 is 124325287245823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 285467043892900 + 43075738630521 = 16895770^2 + 6563211^2 .

It is a cyclic number.

It is not a de Polignac number, because 328542782523421 - 2⁴⁵ = 293358410434589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328542782523491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164271391261710 + 164271391261711.

It is an arithmetic number, because the mean of its divisors is an integer number (164271391261711).

Almost surely, 2^{328542782523421} is an apocalyptic number.

It is an amenable number.

328542782523421 is a deficient number, since it is larger than the sum of its proper divisors (1).

328542782523421 is an equidigital number, since it uses as much as digits as its factorization.

328542782523421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51609600, while the sum is 58.

The spelling of 328542782523421 in words is "three hundred twenty-eight trillion, five hundred forty-two billion, seven hundred eighty-two million, five hundred twenty-three thousand, four hundred twenty-one".