55500365366209 has 2 divisors, whose sum is σ = 55500365366210. Its totient is φ = 55500365366208.

The previous prime is 55500365366197. The next prime is 55500365366233. The reversal of 55500365366209 is 90266356300555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48095653620609 + 7404711745600 = 6935103^2 + 2721160^2 .

It is a cyclic number.

It is not a de Polignac number, because 55500365366209 - 2²⁵ = 55500331811777 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55500365366209.

It is not a weakly prime, because it can be changed into another prime (55500365366249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27750182683104 + 27750182683105.

It is an arithmetic number, because the mean of its divisors is an integer number (27750182683105).

Almost surely, 2^{55500365366209} is an apocalyptic number.

It is an amenable number.

55500365366209 is a deficient number, since it is larger than the sum of its proper divisors (1).

55500365366209 is an equidigital number, since it uses as much as digits as its factorization.

55500365366209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21870000, while the sum is 55.

The spelling of 55500365366209 in words is "fifty-five trillion, five hundred billion, three hundred sixty-five million, three hundred sixty-six thousand, two hundred nine".