6499721232 has 60 divisors (see below), whose sum is σ = 18863914160. Its totient is φ = 2166572448.

The previous prime is 6499721219. The next prime is 6499721311. The reversal of 6499721232 is 2321279946.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 831982 + ... + 839757.

Almost surely, 2^6499721232 is an apocalyptic number.

It is an amenable number.

6499721232 is an abundant number, since it is smaller than the sum of its proper divisors (12364192928).

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

6499721232 is a wasteful number, since it uses less digits than its factorization.

6499721232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671762 (or 1671744 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 6499721232 is about 80620.8486187041. The cubic root of 6499721232 is about 1866.2288984203.

The spelling of 6499721232 in words is "six billion, four hundred ninety-nine million, seven hundred twenty-one thousand, two hundred thirty-two".