6421430785 has 32 divisors (see below), whose sum is σ = 9660902400. Its totient is φ = 3980564160.

The previous prime is 6421430767. The next prime is 6421430801. The reversal of 6421430785 is 5870341246.

It is not a de Polignac number, because 6421430785 - 2⁵ = 6421430753 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 22326 + ... + 115504.

It is an arithmetic number, because the mean of its divisors is an integer number (301903200).

Almost surely, 2^6421430785 is an apocalyptic number.

It is an amenable number.

6421430785 is a deficient number, since it is larger than the sum of its proper divisors (3239471615).

6421430785 is a wasteful number, since it uses less digits than its factorization.

6421430785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93381.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 6421430785 is about 80133.8304650414. The cubic root of 6421430785 is about 1858.7055765310.

The spelling of 6421430785 in words is "six billion, four hundred twenty-one million, four hundred thirty thousand, seven hundred eighty-five".