6421722048 has 378 divisors, whose sum is σ = 22089547896. Its totient is φ = 1778305536.

The previous prime is 6421722037. The next prime is 6421722053. The reversal of 6421722048 is 8402271246.

6421722048 is a `hidden beast` number, since 6 + 421 + 7 + 220 + 4 + 8 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 62346765 + ... + 62346867.

Almost surely, 2^6421722048 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 6421722048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11044773948).

6421722048 is an abundant number, since it is smaller than the sum of its proper divisors (15667825848).

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

6421722048 is a wasteful number, since it uses less digits than its factorization.

6421722048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 162 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 6421722048 is about 80135.6477979682. The cubic root of 6421722048 is about 1858.7336784704.

The spelling of 6421722048 in words is "six billion, four hundred twenty-one million, seven hundred twenty-two thousand, forty-eight".