7799555999 has 2 divisors, whose sum is σ = 7799556000. Its totient is φ = 7799555998.

The previous prime is 7799555963. The next prime is 7799556041. The reversal of 7799555999 is 9995559977.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7799555999 is a prime.

It is a Sophie Germain prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7799555909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3899777999 + 3899778000.

It is an arithmetic number, because the mean of its divisors is an integer number (3899778000).

Almost surely, 2^7799555999 is an apocalyptic number.

7799555999 is a deficient number, since it is larger than the sum of its proper divisors (1).

7799555999 is an equidigital number, since it uses as much as digits as its factorization.

7799555999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 361675125, while the sum is 74.

The square root of 7799555999 is about 88315.0949668289. The cubic root of 7799555999 is about 1983.1548520759.

The spelling of 7799555999 in words is "seven billion, seven hundred ninety-nine million, five hundred fifty-five thousand, nine hundred ninety-nine".