6321281680 has 40 divisors (see below), whose sum is σ = 16796549952. Its totient is φ = 2167296384.

The previous prime is 6321281677. The next prime is 6321281711. The reversal of 6321281680 is 861821236.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 5643442 + ... + 5644561.

Almost surely, 2^6321281680 is an apocalyptic number.

It is an amenable number.

6321281680 is an abundant number, since it is smaller than the sum of its proper divisors (10475268272).

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

6321281680 is a wasteful number, since it uses less digits than its factorization.

6321281680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11288023 (or 11288017 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 6321281680 is about 79506.4882886925. The cubic root of 6321281680 is about 1848.9920664828.

The spelling of 6321281680 in words is "six billion, three hundred twenty-one million, two hundred eighty-one thousand, six hundred eighty".