6421268985 has 32 divisors (see below), whose sum is σ = 10951459200. Its totient is φ = 3201573888.

The previous prime is 6421268947. The next prime is 6421268989. The reversal of 6421268985 is 5898621246.

It is a happy number.

6421268985 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6421268985 - 2⁸ = 6421268729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (6421268989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46507 + ... + 122496.

It is an arithmetic number, because the mean of its divisors is an integer number (342233100).

Almost surely, 2^6421268985 is an apocalyptic number.

It is an amenable number.

6421268985 is a deficient number, since it is larger than the sum of its proper divisors (4530190215).

6421268985 is a wasteful number, since it uses less digits than its factorization.

6421268985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169177.

The product of its digits is 1658880, while the sum is 51.

The square root of 6421268985 is about 80132.8208975573. The cubic root of 6421268985 is about 1858.6899652081.

The spelling of 6421268985 in words is "six billion, four hundred twenty-one million, two hundred sixty-eight thousand, nine hundred eighty-five".