5578915865909 has 2 divisors, whose sum is σ = 5578915865910. Its totient is φ = 5578915865908.

The previous prime is 5578915865899. The next prime is 5578915865917. The reversal of 5578915865909 is 9095685198755.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3594353390884 + 1984562475025 = 1895878^2 + 1408745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5578915865909 is a prime.

It is a super-2 number, since 2×5578915865909² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5578915865909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5578915865969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2789457932954 + 2789457932955.

It is an arithmetic number, because the mean of its divisors is an integer number (2789457932955).

Almost surely, 2^{5578915865909} is an apocalyptic number.

It is an amenable number.

5578915865909 is a deficient number, since it is larger than the sum of its proper divisors (1).

5578915865909 is an equidigital number, since it uses as much as digits as its factorization.

5578915865909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720000, while the sum is 77.

The spelling of 5578915865909 in words is "five trillion, five hundred seventy-eight billion, nine hundred fifteen million, eight hundred sixty-five thousand, nine hundred nine".