6421708272 has 40 divisors (see below), whose sum is σ = 18959330176. Its totient is φ = 1834773696.

The previous prime is 6421708259. The next prime is 6421708289. The reversal of 6421708272 is 2728071246.

It is a self number, because there is not a number n which added to its sum of digits gives 6421708272.

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, 9555778 + ... + 9556449.

Almost surely, 2^6421708272 is an apocalyptic number.

It is an amenable number.

6421708272 is an abundant number, since it is smaller than the sum of its proper divisors (12537621904).

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

6421708272 is a wasteful number, since it uses less digits than its factorization.

6421708272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19112245 (or 19112239 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 6421708272 is about 80135.5618436659. The cubic root of 6421708272 is about 1858.7323493392.

The spelling of 6421708272 in words is "six billion, four hundred twenty-one million, seven hundred eight thousand, two hundred seventy-two".