6405389146 has 16 divisors (see below), whose sum is σ = 10366315848. Its totient is φ = 2950862400.

The previous prime is 6405389143. The next prime is 6405389153. The reversal of 6405389146 is 6419835046.

It can be written as a sum of positive squares in 4 ways, for example, as 2694751921 + 3710637225 = 51911^2 + 60915^2 .

It is a super-2 number, since 2×6405389146² = 82058020223389218632, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6405389096 and 6405389105.

It is not an unprimeable number, because it can be changed into a prime (6405389143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213625 + ... + 241756.

Almost surely, 2^6405389146 is an apocalyptic number.

6405389146 is a deficient number, since it is larger than the sum of its proper divisors (3960926702).

6405389146 is a wasteful number, since it uses less digits than its factorization.

6405389146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455937.

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 6405389146 is about 80033.6750749333. The cubic root of 6405389146 is about 1857.1565164050.

The spelling of 6405389146 in words is "six billion, four hundred five million, three hundred eighty-nine thousand, one hundred forty-six".