639112671 has 48 divisors (see below), whose sum is σ = 1038866400. Its totient is φ = 376233984.

The previous prime is 639112657. The next prime is 639112673. The reversal of 639112671 is 176211936.

639112671 is a `hidden beast` number, since 6 + 391 + 1 + 267 + 1 = 666.

639112671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 639112671 - 2⁷ = 639112543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639112673) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 315855 + ... + 317871.

It is an arithmetic number, because the mean of its divisors is an integer number (21643050).

Almost surely, 2^639112671 is an apocalyptic number.

639112671 is a deficient number, since it is larger than the sum of its proper divisors (399753729).

639112671 is a wasteful number, since it uses less digits than its factorization.

639112671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2168 (or 2165 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 639112671 is about 25280.6778192358. The cubic root of 639112671 is about 861.3754225649.

The spelling of 639112671 in words is "six hundred thirty-nine million, one hundred twelve thousand, six hundred seventy-one".