6421056530 has 48 divisors (see below), whose sum is σ = 13698639000. Its totient is φ = 2159958528.

The previous prime is 6421056497. The next prime is 6421056557. The reversal of 6421056530 is 356501246.

It can be written as a sum of positive squares in 4 ways, for example, as 3643450321 + 2777606209 = 60361^2 + 52703^2 .

It is a super-2 number, since 2×6421056530² = 82459933922911281800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97655 + ... + 149594.

Almost surely, 2^6421056530 is an apocalyptic number.

6421056530 is an abundant number, since it is smaller than the sum of its proper divisors (7277582470).

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

6421056530 is a wasteful number, since it uses less digits than its factorization.

6421056530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247323 (or 247316 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 6421056530 is about 80131.4952437554. The cubic root of 6421056530 is about 1858.6694660236.

Adding to 6421056530 its reverse (356501246), we get a palindrome (6777557776).

The spelling of 6421056530 in words is "six billion, four hundred twenty-one million, fifty-six thousand, five hundred thirty".