7808040864 has 72 divisors (see below), whose sum is σ = 23912136612. Its totient is φ = 2402472960.

The previous prime is 7808040839. The next prime is 7808040887. The reversal of 7808040864 is 4680408087.

It can be written as a sum of positive squares in 2 ways, for example, as 7692693264 + 115347600 = 87708^2 + 10740^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1038997 + ... + 1046484.

Almost surely, 2^7808040864 is an apocalyptic number.

It is an amenable number.

7808040864 is an abundant number, since it is smaller than the sum of its proper divisors (16104095748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7808040864 is a wasteful number, since it uses less digits than its factorization.

7808040864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2085510 (or 2085499 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The square root of 7808040864 is about 88363.1193654909. The cubic root of 7808040864 is about 1983.8737264630.

The spelling of 7808040864 in words is "seven billion, eight hundred eight million, forty thousand, eight hundred sixty-four".