545648591 has 2 divisors, whose sum is σ = 545648592. Its totient is φ = 545648590.

The previous prime is 545648581. The next prime is 545648611. The reversal of 545648591 is 195846545.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-545648591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545648581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272824295 + 272824296.

It is an arithmetic number, because the mean of its divisors is an integer number (272824296).

Almost surely, 2^545648591 is an apocalyptic number.

545648591 is a deficient number, since it is larger than the sum of its proper divisors (1).

545648591 is an equidigital number, since it uses as much as digits as its factorization.

545648591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 47.

The square root of 545648591 is about 23359.1222223781. The cubic root of 545648591 is about 817.1548186555.

The spelling of 545648591 in words is "five hundred forty-five million, six hundred forty-eight thousand, five hundred ninety-one".