545220555109 has 2 divisors, whose sum is σ = 545220555110. Its totient is φ = 545220555108.

The previous prime is 545220555023. The next prime is 545220555119. The reversal of 545220555109 is 901555022545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413991870084 + 131228685025 = 643422^2 + 362255^2 .

It is a cyclic number.

It is not a de Polignac number, because 545220555109 - 2⁷ = 545220554981 is a prime.

It is a super-2 number, since 2×545220555109² (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 (545220555119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272610277554 + 272610277555.

It is an arithmetic number, because the mean of its divisors is an integer number (272610277555).

Almost surely, 2^545220555109 is an apocalyptic number.

It is an amenable number.

545220555109 is a deficient number, since it is larger than the sum of its proper divisors (1).

545220555109 is an equidigital number, since it uses as much as digits as its factorization.

545220555109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450000, while the sum is 43.

The spelling of 545220555109 in words is "five hundred forty-five billion, two hundred twenty million, five hundred fifty-five thousand, one hundred nine".