16545723542477 has 2 divisors, whose sum is σ = 16545723542478. Its totient is φ = 16545723542476.

The previous prime is 16545723542471. The next prime is 16545723542503. The reversal of 16545723542477 is 77424532754561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12906350836681 + 3639372705796 = 3592541^2 + 1907714^2 .

It is a cyclic number.

It is not a de Polignac number, because 16545723542477 - 2¹² = 16545723538381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16545723542471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8272861771238 + 8272861771239.

It is an arithmetic number, because the mean of its divisors is an integer number (8272861771239).

Almost surely, 2^{16545723542477} is an apocalyptic number.

It is an amenable number.

16545723542477 is a deficient number, since it is larger than the sum of its proper divisors (1).

16545723542477 is an equidigital number, since it uses as much as digits as its factorization.

16545723542477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 197568000, while the sum is 62.

The spelling of 16545723542477 in words is "sixteen trillion, five hundred forty-five billion, seven hundred twenty-three million, five hundred forty-two thousand, four hundred seventy-seven".