7788260509 has 2 divisors, whose sum is σ = 7788260510. Its totient is φ = 7788260508.

The previous prime is 7788260497. The next prime is 7788260527. The reversal of 7788260509 is 9050628877.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6856668025 + 931592484 = 82805^2 + 30522^2 .

It is a cyclic number.

It is not a de Polignac number, because 7788260509 - 2⁵ = 7788260477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7788230509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3894130254 + 3894130255.

It is an arithmetic number, because the mean of its divisors is an integer number (3894130255).

Almost surely, 2^7788260509 is an apocalyptic number.

It is an amenable number.

7788260509 is a deficient number, since it is larger than the sum of its proper divisors (1).

7788260509 is an equidigital number, since it uses as much as digits as its factorization.

7788260509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The square root of 7788260509 is about 88251.1218568920. The cubic root of 7788260509 is about 1982.1970399370.

The spelling of 7788260509 in words is "seven billion, seven hundred eighty-eight million, two hundred sixty thousand, five hundred nine".