6639673860432 has 30 divisors (see below), whose sum is σ = 18581865040362. Its totient is φ = 2213224620096.

The previous prime is 6639673860401. The next prime is 6639673860433. The reversal of 6639673860432 is 2340683769366.

6639673860432 is a `hidden beast` number, since 6 + 63 + 9 + 67 + 3 + 86 + 0 + 432 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3474704771136 + 3164969089296 = 1864056^2 + 1779036^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6639673860432.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639673860433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23054422983 + ... + 23054423270.

Almost surely, 2^{6639673860432} is an apocalyptic number.

It is an amenable number.

6639673860432 is an abundant number, since it is smaller than the sum of its proper divisors (11942191179930).

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

6639673860432 is a wasteful number, since it uses less digits than its factorization.

6639673860432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46108846267 (or 46108846258 counting only the distinct ones).

The product of its (nonzero) digits is 141087744, while the sum is 63.

The spelling of 6639673860432 in words is "six trillion, six hundred thirty-nine billion, six hundred seventy-three million, eight hundred sixty thousand, four hundred thirty-two".