55550500505509 has 2 divisors, whose sum is σ = 55550500505510. Its totient is φ = 55550500505508.

The previous prime is 55550500505503. The next prime is 55550500505519. The reversal of 55550500505509 is 90550500505555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36136809732100 + 19413690773409 = 6011390^2 + 4406097^2 .

It is a cyclic number.

It is not a de Polignac number, because 55550500505509 - 2³ = 55550500505501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55550500505501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775250252754 + 27775250252755.

It is an arithmetic number, because the mean of its divisors is an integer number (27775250252755).

Almost surely, 2^{55550500505509} is an apocalyptic number.

It is an amenable number.

55550500505509 is a deficient number, since it is larger than the sum of its proper divisors (1).

55550500505509 is an equidigital number, since it uses as much as digits as its factorization.

55550500505509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3515625, while the sum is 49.

The spelling of 55550500505509 in words is "fifty-five trillion, five hundred fifty billion, five hundred million, five hundred five thousand, five hundred nine".