55509244859 has 2 divisors, whose sum is σ = 55509244860. Its totient is φ = 55509244858.

The previous prime is 55509244799. The next prime is 55509244873. The reversal of 55509244859 is 95844290555.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55509244859 - 2²⁰ = 55508196283 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (55509240859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27754622429 + 27754622430.

It is an arithmetic number, because the mean of its divisors is an integer number (27754622430).

Almost surely, 2^55509244859 is an apocalyptic number.

55509244859 is a deficient number, since it is larger than the sum of its proper divisors (1).

55509244859 is an equidigital number, since it uses as much as digits as its factorization.

55509244859 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960000, while the sum is 56.

The spelling of 55509244859 in words is "fifty-five billion, five hundred nine million, two hundred forty-four thousand, eight hundred fifty-nine".