6421420170 has 96 divisors (see below), whose sum is σ = 18522354240. Its totient is φ = 1530309120.

The previous prime is 6421420141. The next prime is 6421420171. The reversal of 6421420170 is 710241246.

6421420170 is a `hidden beast` number, since 642 + 1 + 4 + 2 + 0 + 17 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (6421420171) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3442 + ... + 113378.

It is an arithmetic number, because the mean of its divisors is an integer number (192941190).

Almost surely, 2^6421420170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6421420170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9261177120).

6421420170 is an abundant number, since it is smaller than the sum of its proper divisors (12100934070).

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

6421420170 is a wasteful number, since it uses less digits than its factorization.

6421420170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110020 (or 110017 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 6421420170 is about 80133.7642320639. The cubic root of 6421420170 is about 1858.7045523475.

The spelling of 6421420170 in words is "six billion, four hundred twenty-one million, four hundred twenty thousand, one hundred seventy".