6491684972 has 12 divisors (see below), whose sum is σ = 11361999936. Its totient is φ = 3245399280.

The previous prime is 6491684963. The next prime is 6491684977. The reversal of 6491684972 is 2794861946.

It is not an unprimeable number, because it can be changed into a prime (6491684977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76679 + ... + 137342.

It is an arithmetic number, because the mean of its divisors is an integer number (946833328).

Almost surely, 2^6491684972 is an apocalyptic number.

It is an amenable number.

6491684972 is a deficient number, since it is larger than the sum of its proper divisors (4870314964).

6491684972 is a wasteful number, since it uses less digits than its factorization.

6491684972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221608 (or 221606 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 56.

The square root of 6491684972 is about 80570.9933660992. The cubic root of 6491684972 is about 1865.4594456323.

The spelling of 6491684972 in words is "six billion, four hundred ninety-one million, six hundred eighty-four thousand, nine hundred seventy-two".