6453243220 has 72 divisors (see below), whose sum is σ = 14396231304. Its totient is φ = 2429436672.

The previous prime is 6453243191. The next prime is 6453243281. The reversal of 6453243220 is 223423546.

It can be written as a sum of positive squares in 4 ways, for example, as 12996 + 6453230224 = 114^2 + 80332^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1130694 + ... + 1136386.

It is an arithmetic number, because the mean of its divisors is an integer number (199947657).

Almost surely, 2^6453243220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6453243220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7198115652).

6453243220 is an abundant number, since it is smaller than the sum of its proper divisors (7942988084).

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

6453243220 is a wasteful number, since it uses less digits than its factorization.

6453243220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5897 (or 5876 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 31.

The square root of 6453243220 is about 80332.0808892686. The cubic root of 6453243220 is about 1861.7699285356.

Adding to 6453243220 its reverse (223423546), we get a palindrome (6676666766).

The spelling of 6453243220 in words is "six billion, four hundred fifty-three million, two hundred forty-three thousand, two hundred twenty".