545215123549 has 2 divisors, whose sum is σ = 545215123550. Its totient is φ = 545215123548.

The previous prime is 545215123513. The next prime is 545215123553. The reversal of 545215123549 is 945321512545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 516896292025 + 28318831524 = 718955^2 + 168282^2 .

It is a cyclic number.

It is not a de Polignac number, because 545215123549 - 2⁷ = 545215123421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 545215123499 and 545215123508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545215123949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272607561774 + 272607561775.

It is an arithmetic number, because the mean of its divisors is an integer number (272607561775).

Almost surely, 2^545215123549 is an apocalyptic number.

It is an amenable number.

545215123549 is a deficient number, since it is larger than the sum of its proper divisors (1).

545215123549 is an equidigital number, since it uses as much as digits as its factorization.

545215123549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080000, while the sum is 46.

The spelling of 545215123549 in words is "five hundred forty-five billion, two hundred fifteen million, one hundred twenty-three thousand, five hundred forty-nine".