6485333220 has 144 divisors (see below), whose sum is σ = 20553689520. Its totient is φ = 1653120000.

The previous prime is 6485333203. The next prime is 6485333227. The reversal of 6485333220 is 223335846.

It is a happy number.

6485333220 is a `hidden beast` number, since 648 + 5 + 3 + 3 + 3 + 2 + 2 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 163175076 + 6322158144 = 12774^2 + 79512^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (6485333227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 521070 + ... + 533370.

It is an arithmetic number, because the mean of its divisors is an integer number (142733955).

Almost surely, 2^6485333220 is an apocalyptic number.

6485333220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6485333220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10276844760).

6485333220 is an abundant number, since it is smaller than the sum of its proper divisors (14068356300).

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

6485333220 is a wasteful number, since it uses less digits than its factorization.

6485333220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12446 (or 12441 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 36.

The square root of 6485333220 is about 80531.5666058968. The cubic root of 6485333220 is about 1864.8508310519.

The spelling of 6485333220 in words is "six billion, four hundred eighty-five million, three hundred thirty-three thousand, two hundred twenty".