6539885582401 has 2 divisors, whose sum is σ = 6539885582402. Its totient is φ = 6539885582400.

The previous prime is 6539885582339. The next prime is 6539885582413. The reversal of 6539885582401 is 1042855889356.

It is a Cunningham number, because it is equal to 2557320²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6539885582400 + 1 = 2557320^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 6539885582401 - 2¹¹ = 6539885580353 is a prime.

It is not a weakly prime, because it can be changed into another prime (6539885582431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3269942791200 + 3269942791201.

It is an arithmetic number, because the mean of its divisors is an integer number (3269942791201).

Almost surely, 2^{6539885582401} is an apocalyptic number.

It is an amenable number.

6539885582401 is a deficient number, since it is larger than the sum of its proper divisors (1).

6539885582401 is an equidigital number, since it uses as much as digits as its factorization.

6539885582401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944000, while the sum is 64.

The spelling of 6539885582401 in words is "six trillion, five hundred thirty-nine billion, eight hundred eighty-five million, five hundred eighty-two thousand, four hundred one".