2655636509 has 2 divisors, whose sum is σ = 2655636510. Its totient is φ = 2655636508.

The previous prime is 2655636469. The next prime is 2655636539. The reversal of 2655636509 is 9056365562.

2655636509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2109105625 + 546530884 = 45925^2 + 23378^2 .

It is a cyclic number.

It is not a de Polignac number, because 2655636509 - 2²⁰ = 2654587933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2655636539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1327818254 + 1327818255.

It is an arithmetic number, because the mean of its divisors is an integer number (1327818255).

Almost surely, 2^2655636509 is an apocalyptic number.

It is an amenable number.

2655636509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2655636509 is an equidigital number, since it uses as much as digits as its factorization.

2655636509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458000, while the sum is 47.

The square root of 2655636509 is about 51532.8682396002. The cubic root of 2655636509 is about 1384.8079354150.

The spelling of 2655636509 in words is "two billion, six hundred fifty-five million, six hundred thirty-six thousand, five hundred nine".