16545126477409 has 2 divisors, whose sum is σ = 16545126477410. Its totient is φ = 16545126477408.

The previous prime is 16545126477377. The next prime is 16545126477419. The reversal of 16545126477409 is 90477462154561.

16545126477409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15654881390625 + 890245086784 = 3956625^2 + 943528^2 .

It is a cyclic number.

It is not a de Polignac number, because 16545126477409 - 2⁵ = 16545126477377 is a prime.

It is not a weakly prime, because it can be changed into another prime (16545126477419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8272563238704 + 8272563238705.

It is an arithmetic number, because the mean of its divisors is an integer number (8272563238705).

Almost surely, 2^{16545126477409} is an apocalyptic number.

It is an amenable number.

16545126477409 is a deficient number, since it is larger than the sum of its proper divisors (1).

16545126477409 is an equidigital number, since it uses as much as digits as its factorization.

16545126477409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50803200, while the sum is 61.

The spelling of 16545126477409 in words is "sixteen trillion, five hundred forty-five billion, one hundred twenty-six million, four hundred seventy-seven thousand, four hundred nine".