7686648128 has 28 divisors (see below), whose sum is σ = 15779168340. Its totient is φ = 3710794752.

The previous prime is 7686648091. The next prime is 7686648149. The reversal of 7686648128 is 8218466867.

It can be written as a sum of positive squares in 2 ways, for example, as 2555504704 + 5131143424 = 50552^2 + 71632^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068901 + ... + 2072612.

Almost surely, 2^7686648128 is an apocalyptic number.

It is an amenable number.

7686648128 is an abundant number, since it is smaller than the sum of its proper divisors (8092520212).

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

7686648128 is a wasteful number, since it uses less digits than its factorization.

7686648128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4141554 (or 4141544 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 56.

The square root of 7686648128 is about 87673.5315132224. The cubic root of 7686648128 is about 1973.5387901896.

The spelling of 7686648128 in words is "seven billion, six hundred eighty-six million, six hundred forty-eight thousand, one hundred twenty-eight".