8555807245109 has 2 divisors, whose sum is σ = 8555807245110. Its totient is φ = 8555807245108.

The previous prime is 8555807245099. The next prime is 8555807245171. The reversal of 8555807245109 is 9015427085558.

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., 7952005204900 + 603802040209 = 2819930^2 + 777047^2 .

It is a cyclic number.

It is not a de Polignac number, because 8555807245109 - 2⁴ = 8555807245093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8555807245199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4277903622554 + 4277903622555.

It is an arithmetic number, because the mean of its divisors is an integer number (4277903622555).

Almost surely, 2^{8555807245109} is an apocalyptic number.

It is an amenable number.

8555807245109 is a deficient number, since it is larger than the sum of its proper divisors (1).

8555807245109 is an equidigital number, since it uses as much as digits as its factorization.

8555807245109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160000, while the sum is 59.

The spelling of 8555807245109 in words is "eight trillion, five hundred fifty-five billion, eight hundred seven million, two hundred forty-five thousand, one hundred nine".