6471686388 has 24 divisors (see below), whose sum is σ = 15103243008. Its totient is φ = 2156851456.

The previous prime is 6471686339. The next prime is 6471686401. The reversal of 6471686388 is 8836861746.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29245 + ... + 117467.

It is an arithmetic number, because the mean of its divisors is an integer number (629301792).

Almost surely, 2^6471686388 is an apocalyptic number.

It is an amenable number.

6471686388 is an abundant number, since it is smaller than the sum of its proper divisors (8631556620).

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

6471686388 is a wasteful number, since it uses less digits than its factorization.

6471686388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94343 (or 94341 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 57.

The square root of 6471686388 is about 80446.7922791207. The cubic root of 6471686388 is about 1863.5418683670.

The spelling of 6471686388 in words is "six billion, four hundred seventy-one million, six hundred eighty-six thousand, three hundred eighty-eight".