4780116866509 has 2 divisors, whose sum is σ = 4780116866510. Its totient is φ = 4780116866508.

The previous prime is 4780116866501. The next prime is 4780116866527. The reversal of 4780116866509 is 9056686110874.

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., 4139812830409 + 640304036100 = 2034653^2 + 800190^2 .

It is a cyclic number.

It is not a de Polignac number, because 4780116866509 - 2³ = 4780116866501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4780116866501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2390058433254 + 2390058433255.

It is an arithmetic number, because the mean of its divisors is an integer number (2390058433255).

Almost surely, 2^{4780116866509} is an apocalyptic number.

It is an amenable number.

4780116866509 is a deficient number, since it is larger than the sum of its proper divisors (1).

4780116866509 is an equidigital number, since it uses as much as digits as its factorization.

4780116866509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17418240, while the sum is 61.

The spelling of 4780116866509 in words is "four trillion, seven hundred eighty billion, one hundred sixteen million, eight hundred sixty-six thousand, five hundred nine".