6421614220 has 24 divisors (see below), whose sum is σ = 15411874464. Its totient is φ = 2201696256.

The previous prime is 6421614209. The next prime is 6421614233. The reversal of 6421614220 is 224161246.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22934197 + ... + 22934476.

It is an arithmetic number, because the mean of its divisors is an integer number (642161436).

Almost surely, 2^6421614220 is an apocalyptic number.

It is an amenable number.

6421614220 is an abundant number, since it is smaller than the sum of its proper divisors (8990260244).

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

6421614220 is a wasteful number, since it uses less digits than its factorization.

6421614220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45868689 (or 45868687 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 6421614220 is about 80134.9750109152. The cubic root of 6421614220 is about 1858.7232749963.

Adding to 6421614220 its reverse (224161246), we get a palindrome (6645775466).

The spelling of 6421614220 in words is "six billion, four hundred twenty-one million, six hundred fourteen thousand, two hundred twenty".