544546198109 has 2 divisors, whose sum is σ = 544546198110. Its totient is φ = 544546198108.

The previous prime is 544546198099. The next prime is 544546198177. The reversal of 544546198109 is 901891645445.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452924962009 + 91621236100 = 672997^2 + 302690^2 .

It is a cyclic number.

It is not a de Polignac number, because 544546198109 - 2⁴ = 544546198093 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544546198409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 272273099054 + 272273099055.

It is an arithmetic number, because the mean of its divisors is an integer number (272273099055).

Almost surely, 2^544546198109 is an apocalyptic number.

It is an amenable number.

544546198109 is a deficient number, since it is larger than the sum of its proper divisors (1).

544546198109 is an equidigital number, since it uses as much as digits as its factorization.

544546198109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 56.

The spelling of 544546198109 in words is "five hundred forty-four billion, five hundred forty-six million, one hundred ninety-eight thousand, one hundred nine".