2000555509 has 2 divisors, whose sum is σ = 2000555510. Its totient is φ = 2000555508.

The previous prime is 2000555497. The next prime is 2000555549. The reversal of 2000555509 is 9055550002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1068963025 + 931592484 = 32695^2 + 30522^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000555509 - 2¹¹ = 2000553461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2000555549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000277754 + 1000277755.

It is an arithmetic number, because the mean of its divisors is an integer number (1000277755).

Almost surely, 2^2000555509 is an apocalyptic number.

It is an amenable number.

2000555509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2000555509 is an equidigital number, since it uses as much as digits as its factorization.

2000555509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11250, while the sum is 31.

The square root of 2000555509 is about 44727.5698982183. The cubic root of 2000555509 is about 1260.0376886770.

The spelling of 2000555509 in words is "two billion, five hundred fifty-five thousand, five hundred nine".