6514640256 has 64 divisors (see below), whose sum is σ = 17314606080. Its totient is φ = 2170280448.

The previous prime is 6514640239. The next prime is 6514640269. The reversal of 6514640256 is 6520464156.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 843645 + ... + 851331.

It is an arithmetic number, because the mean of its divisors is an integer number (270540720).

Almost surely, 2^6514640256 is an apocalyptic number.

It is an amenable number.

6514640256 is an abundant number, since it is smaller than the sum of its proper divisors (10799965824).

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

6514640256 is a wasteful number, since it uses less digits than its factorization.

6514640256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9911 (or 9899 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 6514640256 is about 80713.3214283739. The cubic root of 6514640256 is about 1867.6556795286.

The spelling of 6514640256 in words is "six billion, five hundred fourteen million, six hundred forty thousand, two hundred fifty-six".