6440502345 has 32 divisors (see below), whose sum is σ = 10355866752. Its totient is φ = 3417956352.

The previous prime is 6440502337. The next prime is 6440502349. The reversal of 6440502345 is 5432050446.

It is not a de Polignac number, because 6440502345 - 2³ = 6440502337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6440502349) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5308959 + ... + 5310171.

It is an arithmetic number, because the mean of its divisors is an integer number (323620836).

Almost surely, 2^6440502345 is an apocalyptic number.

It is an amenable number.

6440502345 is a deficient number, since it is larger than the sum of its proper divisors (3915364407).

6440502345 is a wasteful number, since it uses less digits than its factorization.

6440502345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2681.

The product of its (nonzero) digits is 57600, while the sum is 33.

The square root of 6440502345 is about 80252.7404204990. The cubic root of 6440502345 is about 1860.5438677226.

The spelling of 6440502345 in words is "six billion, four hundred forty million, five hundred two thousand, three hundred forty-five".