2255636989 has 2 divisors, whose sum is σ = 2255636990. Its totient is φ = 2255636988.

The previous prime is 2255636983. The next prime is 2255637011. The reversal of 2255636989 is 9896365522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2147580964 + 108056025 = 46342^2 + 10395^2 .

It is a cyclic number.

It is not a de Polignac number, because 2255636989 - 2¹³ = 2255628797 is a prime.

It is a super-2 number, since 2×2255636989² = 10175796452289972242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2255636983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127818494 + 1127818495.

It is an arithmetic number, because the mean of its divisors is an integer number (1127818495).

Almost surely, 2^2255636989 is an apocalyptic number.

It is an amenable number.

2255636989 is a deficient number, since it is larger than the sum of its proper divisors (1).

2255636989 is an equidigital number, since it uses as much as digits as its factorization.

2255636989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6998400, while the sum is 55.

The square root of 2255636989 is about 47493.5468142778. The cubic root of 2255636989 is about 1311.4640875049.

The spelling of 2255636989 in words is "two billion, two hundred fifty-five million, six hundred thirty-six thousand, nine hundred eighty-nine".