6421428395 has 16 divisors (see below), whose sum is σ = 7789908672. Its totient is φ = 5081134080.

The previous prime is 6421428361. The next prime is 6421428401. The reversal of 6421428395 is 5938241246.

6421428395 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 6421428395 - 2²⁸ = 6152992939 is a prime.

It is a super-2 number, since 2×6421428395² = 82469485264224552050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 446639 + ... + 460791.

It is an arithmetic number, because the mean of its divisors is an integer number (486869292).

Almost surely, 2^6421428395 is an apocalyptic number.

6421428395 is a deficient number, since it is larger than the sum of its proper divisors (1368480277).

6421428395 is a wasteful number, since it uses less digits than its factorization.

6421428395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15142.

The product of its digits is 414720, while the sum is 44.

The square root of 6421428395 is about 80133.8155524870. The cubic root of 6421428395 is about 1858.7053459330.

The spelling of 6421428395 in words is "six billion, four hundred twenty-one million, four hundred twenty-eight thousand, three hundred ninety-five".