7788761313 has 4 divisors (see below), whose sum is σ = 10385015088. Its totient is φ = 5192507540.

The previous prime is 7788761297. The next prime is 7788761317. The reversal of 7788761313 is 3131678877.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7788761313 - 2⁴ = 7788761297 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7788761317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1298126883 + ... + 1298126888.

It is an arithmetic number, because the mean of its divisors is an integer number (2596253772).

Almost surely, 2^7788761313 is an apocalyptic number.

It is an amenable number.

7788761313 is a deficient number, since it is larger than the sum of its proper divisors (2596253775).

7788761313 is a wasteful number, since it uses less digits than its factorization.

7788761313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596253774.

The product of its digits is 1185408, while the sum is 51.

The square root of 7788761313 is about 88253.9591916419. The cubic root of 7788761313 is about 1982.2395257154.

The spelling of 7788761313 in words is "seven billion, seven hundred eighty-eight million, seven hundred sixty-one thousand, three hundred thirteen".