2009155559 has 2 divisors, whose sum is σ = 2009155560. Its totient is φ = 2009155558.

The previous prime is 2009155543. The next prime is 2009155609. The reversal of 2009155559 is 9555519002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2009155559 - 2⁴ = 2009155543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2009155259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004577779 + 1004577780.

It is an arithmetic number, because the mean of its divisors is an integer number (1004577780).

Almost surely, 2^2009155559 is an apocalyptic number.

2009155559 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009155559 is an equidigital number, since it uses as much as digits as its factorization.

2009155559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 101250, while the sum is 41.

The square root of 2009155559 is about 44823.6049308844. The cubic root of 2009155559 is about 1261.8406705858.

The spelling of 2009155559 in words is "two billion, nine million, one hundred fifty-five thousand, five hundred fifty-nine".