55393851109 has 2 divisors, whose sum is σ = 55393851110. Its totient is φ = 55393851108.

The previous prime is 55393851043. The next prime is 55393851157. The reversal of 55393851109 is 90115839355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47122858084 + 8270993025 = 217078^2 + 90945^2 .

It is a cyclic number.

It is not a de Polignac number, because 55393851109 - 2⁹ = 55393850597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55393851209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27696925554 + 27696925555.

It is an arithmetic number, because the mean of its divisors is an integer number (27696925555).

Almost surely, 2^55393851109 is an apocalyptic number.

It is an amenable number.

55393851109 is a deficient number, since it is larger than the sum of its proper divisors (1).

55393851109 is an equidigital number, since it uses as much as digits as its factorization.

55393851109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729000, while the sum is 49.

The spelling of 55393851109 in words is "fifty-five billion, three hundred ninety-three million, eight hundred fifty-one thousand, one hundred nine".