6405240626 has 8 divisors (see below), whose sum is σ = 9608386860. Its totient is φ = 3202445008.

The previous prime is 6405240623. The next prime is 6405240631. The reversal of 6405240626 is 6260425046.

It can be written as a sum of positive squares in 2 ways, for example, as 5945181025 + 460059601 = 77105^2 + 21449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6405240623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35861 + ... + 118728.

Almost surely, 2^6405240626 is an apocalyptic number.

6405240626 is a deficient number, since it is larger than the sum of its proper divisors (3203146234).

6405240626 is a wasteful number, since it uses less digits than its factorization.

6405240626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175308.

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 6405240626 is about 80032.7472101264. The cubic root of 6405240626 is about 1857.1421625013.

The spelling of 6405240626 in words is "six billion, four hundred five million, two hundred forty thousand, six hundred twenty-six".