16505231441 has 2 divisors, whose sum is σ = 16505231442. Its totient is φ = 16505231440.

The previous prime is 16505231383. The next prime is 16505231443. The reversal of 16505231441 is 14413250561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16491696400 + 13535041 = 128420^2 + 3679^2 .

It is a cyclic number.

It is not a de Polignac number, because 16505231441 - 2⁶ = 16505231377 is a prime.

Together with 16505231443, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 16505231398 and 16505231407.

It is not a weakly prime, because it can be changed into another prime (16505231443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252615720 + 8252615721.

It is an arithmetic number, because the mean of its divisors is an integer number (8252615721).

Almost surely, 2^16505231441 is an apocalyptic number.

It is an amenable number.

16505231441 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505231441 is an equidigital number, since it uses as much as digits as its factorization.

16505231441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The spelling of 16505231441 in words is "sixteen billion, five hundred five million, two hundred thirty-one thousand, four hundred forty-one".