545345557 has 2 divisors, whose sum is σ = 545345558. Its totient is φ = 545345556.

The previous prime is 545345539. The next prime is 545345569. The reversal of 545345557 is 755543545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478121956 + 67223601 = 21866^2 + 8199^2 .

It is a cyclic number.

It is not a de Polignac number, because 545345557 - 2¹¹ = 545343509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545345527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272672778 + 272672779.

It is an arithmetic number, because the mean of its divisors is an integer number (272672779).

Almost surely, 2^545345557 is an apocalyptic number.

It is an amenable number.

545345557 is a deficient number, since it is larger than the sum of its proper divisors (1).

545345557 is an equidigital number, since it uses as much as digits as its factorization.

545345557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1050000, while the sum is 43.

The square root of 545345557 is about 23352.6349048667. The cubic root of 545345557 is about 817.0035176458.

The spelling of 545345557 in words is "five hundred forty-five million, three hundred forty-five thousand, five hundred fifty-seven".