545500331309 has 2 divisors, whose sum is σ = 545500331310. Its totient is φ = 545500331308.

The previous prime is 545500331287. The next prime is 545500331359. The reversal of 545500331309 is 903133005545.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344191075684 + 201309255625 = 586678^2 + 448675^2 .

It is a cyclic number.

It is not a de Polignac number, because 545500331309 - 2²⁴ = 545483554093 is a prime.

It is a super-2 number, since 2×545500331309² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (545500331359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272750165654 + 272750165655.

It is an arithmetic number, because the mean of its divisors is an integer number (272750165655).

Almost surely, 2^545500331309 is an apocalyptic number.

It is an amenable number.

545500331309 is a deficient number, since it is larger than the sum of its proper divisors (1).

545500331309 is an equidigital number, since it uses as much as digits as its factorization.

545500331309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 121500, while the sum is 38.

The spelling of 545500331309 in words is "five hundred forty-five billion, five hundred million, three hundred thirty-one thousand, three hundred nine".