6404726845 has 16 divisors (see below), whose sum is σ = 8403500160. Its totient is φ = 4647355200.

The previous prime is 6404726827. The next prime is 6404726849. The reversal of 6404726845 is 5486274046.

It is a happy number.

It is not a de Polignac number, because 6404726845 - 2¹⁵ = 6404694077 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6404726795 and 6404726804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404726849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108486 + ... + 156775.

It is an arithmetic number, because the mean of its divisors is an integer number (525218760).

Almost surely, 2^6404726845 is an apocalyptic number.

It is an amenable number.

6404726845 is a deficient number, since it is larger than the sum of its proper divisors (1998773315).

6404726845 is a wasteful number, since it uses less digits than its factorization.

6404726845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265716.

The product of its (nonzero) digits is 1290240, while the sum is 46.

The square root of 6404726845 is about 80029.5373284139. The cubic root of 6404726845 is about 1857.0925057735.

The spelling of 6404726845 in words is "six billion, four hundred four million, seven hundred twenty-six thousand, eight hundred forty-five".