6440535275 has 12 divisors (see below), whose sum is σ = 8003753352. Its totient is φ = 5141144640.

The previous prime is 6440535239. The next prime is 6440535329. The reversal of 6440535275 is 5725350446.

It is not a de Polignac number, because 6440535275 - 2⁸ = 6440535019 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 270437 + ... + 293286.

It is an arithmetic number, because the mean of its divisors is an integer number (666979446).

Almost surely, 2^6440535275 is an apocalyptic number.

6440535275 is a deficient number, since it is larger than the sum of its proper divisors (1563218077).

6440535275 is a wasteful number, since it uses less digits than its factorization.

6440535275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564190 (or 564185 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 41.

The square root of 6440535275 is about 80252.9455845703. The cubic root of 6440535275 is about 1860.5470386763.

The spelling of 6440535275 in words is "six billion, four hundred forty million, five hundred thirty-five thousand, two hundred seventy-five".