7768487979 has 40 divisors (see below), whose sum is σ = 13533317600. Its totient is φ = 4439120112.

The previous prime is 7768487959. The next prime is 7768487999. The reversal of 7768487979 is 9797848677.

7768487979 is a `hidden beast` number, since 7 + 76 + 8 + 487 + 9 + 79 = 666.

It is an interprime number because it is at equal distance from previous prime (7768487959) and next prime (7768487999).

It is not a de Polignac number, because 7768487979 - 2⁷ = 7768487851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7768487959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 112024 + ... + 167589.

It is an arithmetic number, because the mean of its divisors is an integer number (338332940).

Almost surely, 2^7768487979 is an apocalyptic number.

7768487979 is a deficient number, since it is larger than the sum of its proper divisors (5764829621).

7768487979 is an equidigital number, since it uses as much as digits as its factorization.

7768487979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279646 (or 279623 counting only the distinct ones).

The product of its digits is 298722816, while the sum is 72.

The square root of 7768487979 is about 88139.0264241670. The cubic root of 7768487979 is about 1980.5181770505.

The spelling of 7768487979 in words is "seven billion, seven hundred sixty-eight million, four hundred eighty-seven thousand, nine hundred seventy-nine".