6404635144 has 32 divisors (see below), whose sum is σ = 12188799000. Its totient is φ = 3154401792.

The previous prime is 6404635103. The next prime is 6404635219. The reversal of 6404635144 is 4415364046.

It can be written as a sum of positive squares in 4 ways, for example, as 6385608100 + 19027044 = 79910^2 + 4362^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 477522 + ... + 490750.

Almost surely, 2^6404635144 is an apocalyptic number.

It is an amenable number.

6404635144 is a deficient number, since it is larger than the sum of its proper divisors (5784163856).

6404635144 is a wasteful number, since it uses less digits than its factorization.

6404635144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14137 (or 14133 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The square root of 6404635144 is about 80028.9644066447. The cubic root of 6404635144 is about 1857.0836426293.

The spelling of 6404635144 in words is "six billion, four hundred four million, six hundred thirty-five thousand, one hundred forty-four".