43545538609777 has 2 divisors, whose sum is σ = 43545538609778. Its totient is φ = 43545538609776.

The previous prime is 43545538609739. The next prime is 43545538609799. The reversal of 43545538609777 is 77790683554534.

43545538609777 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., 28850820719616 + 14694717890161 = 5371296^2 + 3833369^2 .

It is a cyclic number.

It is not a de Polignac number, because 43545538609777 - 2¹¹ = 43545538607729 is a prime.

It is not a weakly prime, because it can be changed into another prime (43545538639777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21772769304888 + 21772769304889.

It is an arithmetic number, because the mean of its divisors is an integer number (21772769304889).

Almost surely, 2^{43545538609777} is an apocalyptic number.

It is an amenable number.

43545538609777 is a deficient number, since it is larger than the sum of its proper divisors (1).

43545538609777 is an equidigital number, since it uses as much as digits as its factorization.

43545538609777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168000, while the sum is 73.

The spelling of 43545538609777 in words is "forty-three trillion, five hundred forty-five billion, five hundred thirty-eight million, six hundred nine thousand, seven hundred seventy-seven".