16505245453 has 2 divisors, whose sum is σ = 16505245454. Its totient is φ = 16505245452.

The previous prime is 16505245429. The next prime is 16505245459. The reversal of 16505245453 is 35454250561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12787538724 + 3717706729 = 113082^2 + 60973^2 .

It is a cyclic number.

It is not a de Polignac number, because 16505245453 - 2⁹ = 16505244941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16505245459) 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, 8252622726 + 8252622727.

It is an arithmetic number, because the mean of its divisors is an integer number (8252622727).

Almost surely, 2^16505245453 is an apocalyptic number.

It is an amenable number.

16505245453 is a deficient number, since it is larger than the sum of its proper divisors (1).

16505245453 is an equidigital number, since it uses as much as digits as its factorization.

16505245453 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 16505245453 in words is "sixteen billion, five hundred five million, two hundred forty-five thousand, four hundred fifty-three".