6421056544 has 48 divisors (see below), whose sum is σ = 14467457088. Its totient is φ = 2748056832.

The previous prime is 6421056497. The next prime is 6421056557. The reversal of 6421056544 is 4456501246.

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, 144639 + ... + 183745.

It is an arithmetic number, because the mean of its divisors is an integer number (301405356).

Almost surely, 2^6421056544 is an apocalyptic number.

It is an amenable number.

6421056544 is an abundant number, since it is smaller than the sum of its proper divisors (8046400544).

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

6421056544 is a wasteful number, since it uses less digits than its factorization.

6421056544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39857 (or 39849 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 37.

The square root of 6421056544 is about 80131.4953311118. The cubic root of 6421056544 is about 1858.6694673745.

The spelling of 6421056544 in words is "six billion, four hundred twenty-one million, fifty-six thousand, five hundred forty-four".