6321992720 has 40 divisors (see below), whose sum is σ = 14899997976. Its totient is φ = 2494153728.

The previous prime is 6321992717. The next prime is 6321992723. The reversal of 6321992720 is 272991236.

It is an interprime number because it is at equal distance from previous prime (6321992717) and next prime (6321992723).

It can be written as a sum of positive squares in 4 ways, for example, as 1106704 + 6320886016 = 1052^2 + 79504^2 .

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

It is not an unprimeable number, because it can be changed into a prime (6321992723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535427 + ... + 547106.

Almost surely, 2^6321992720 is an apocalyptic number.

It is an amenable number.

6321992720 is an abundant number, since it is smaller than the sum of its proper divisors (8578005256).

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

6321992720 is a wasteful number, since it uses less digits than its factorization.

6321992720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082619 (or 1082613 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 6321992720 is about 79510.9597476977. The cubic root of 6321992720 is about 1849.0613909276.

The spelling of 6321992720 in words is "six billion, three hundred twenty-one million, nine hundred ninety-two thousand, seven hundred twenty".