8642655755309 has 2 divisors, whose sum is σ = 8642655755310. Its totient is φ = 8642655755308.

The previous prime is 8642655755183. The next prime is 8642655755329. The reversal of 8642655755309 is 9035575562468.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7836763534084 + 805892221225 = 2799422^2 + 897715^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8642655755309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8642655755329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321327877654 + 4321327877655.

It is an arithmetic number, because the mean of its divisors is an integer number (4321327877655).

Almost surely, 2^{8642655755309} is an apocalyptic number.

It is an amenable number.

8642655755309 is a deficient number, since it is larger than the sum of its proper divisors (1).

8642655755309 is an equidigital number, since it uses as much as digits as its factorization.

8642655755309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160000, while the sum is 65.

The spelling of 8642655755309 in words is "eight trillion, six hundred forty-two billion, six hundred fifty-five million, seven hundred fifty-five thousand, three hundred nine".