6405726400 has 42 divisors (see below), whose sum is σ = 15762094460. Its totient is φ = 2562289920.

The previous prime is 6405726359. The next prime is 6405726413. The reversal of 6405726400 is 46275046.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2000190 + ... + 2003389.

Almost surely, 2^6405726400 is an apocalyptic number.

It is an amenable number.

6405726400 is an abundant number, since it is smaller than the sum of its proper divisors (9356368060).

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

6405726400 is a wasteful number, since it uses less digits than its factorization.

6405726400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4003601 (or 4003586 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 6405726400 is about 80035.7819978040. The cubic root of 6405726400 is about 1857.1891099216.

The spelling of 6405726400 in words is "six billion, four hundred five million, seven hundred twenty-six thousand, four hundred".