6421593992 has 32 divisors (see below), whose sum is σ = 13144502880. Its totient is φ = 2916812160.

The previous prime is 6421593947. The next prime is 6421594009. The reversal of 6421593992 is 2993951246.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 6421593992.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100643 + ... + 151565.

It is an arithmetic number, because the mean of its divisors is an integer number (410765715).

Almost surely, 2^6421593992 is an apocalyptic number.

It is an amenable number.

6421593992 is an abundant number, since it is smaller than the sum of its proper divisors (6722908888).

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

6421593992 is a wasteful number, since it uses less digits than its factorization.

6421593992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52373 (or 52369 counting only the distinct ones).

The product of its digits is 1049760, while the sum is 50.

The square root of 6421593992 is about 80134.8487987592. The cubic root of 6421593992 is about 1858.7213233430.

The spelling of 6421593992 in words is "six billion, four hundred twenty-one million, five hundred ninety-three thousand, nine hundred ninety-two".