6421775360 has 528 divisors, whose sum is σ = 21170237760. Its totient is φ = 1837301760.

The previous prime is 6421775357. The next prime is 6421775417. The reversal of 6421775360 is 635771246.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35875751 + ... + 35875929.

Almost surely, 2^6421775360 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 6421775360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10585118880).

6421775360 is an abundant number, since it is smaller than the sum of its proper divisors (14748462400).

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

6421775360 is a wasteful number, since it uses less digits than its factorization.

6421775360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 217 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 6421775360 is about 80135.9804332611. The cubic root of 6421775360 is about 1858.7388220822.

The spelling of 6421775360 in words is "six billion, four hundred twenty-one million, seven hundred seventy-five thousand, three hundred sixty".