545349813161 has 2 divisors, whose sum is σ = 545349813162. Its totient is φ = 545349813160.

The previous prime is 545349813157. The next prime is 545349813221. The reversal of 545349813161 is 161318943545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274622113936 + 270727699225 = 524044^2 + 520315^2 .

It is a cyclic number.

It is not a de Polignac number, because 545349813161 - 2² = 545349813157 is a prime.

It is not a weakly prime, because it can be changed into another prime (545349813121) 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, 272674906580 + 272674906581.

It is an arithmetic number, because the mean of its divisors is an integer number (272674906581).

Almost surely, 2^545349813161 is an apocalyptic number.

It is an amenable number.

545349813161 is a deficient number, since it is larger than the sum of its proper divisors (1).

545349813161 is an equidigital number, since it uses as much as digits as its factorization.

545349813161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1555200, while the sum is 50.

The spelling of 545349813161 in words is "five hundred forty-five billion, three hundred forty-nine million, eight hundred thirteen thousand, one hundred sixty-one".