6421570560 has 528 divisors, whose sum is σ = 23819612544. Its totient is φ = 1596063744.

The previous prime is 6421570553. The next prime is 6421570627. The reversal of 6421570560 is 650751246.

It is a happy number.

6421570560 is a `hidden beast` number, since 6 + 4 + 21 + 5 + 70 + 560 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

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 47 ways as a sum of consecutive naturals, for example, 77368279 + ... + 77368361.

Almost surely, 2^6421570560 is an apocalyptic number.

6421570560 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 6421570560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11909806272).

6421570560 is an abundant number, since it is smaller than the sum of its proper divisors (17398041984).

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

6421570560 is a wasteful number, since it uses less digits than its factorization.

6421570560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210 (or 189 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 6421570560 is about 80134.7025950680. The cubic root of 6421570560 is about 1858.7190625538.

The spelling of 6421570560 in words is "six billion, four hundred twenty-one million, five hundred seventy thousand, five hundred sixty".