7647120256 has 32 divisors (see below), whose sum is σ = 15443208000. Its totient is φ = 3771177984.

The previous prime is 7647120233. The next prime is 7647120259. The reversal of 7647120256 is 6520217467.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7647120259) 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 3 ways as a sum of consecutive naturals, for example, 399856 + ... + 418543.

It is an arithmetic number, because the mean of its divisors is an integer number (482600250).

Almost surely, 2^7647120256 is an apocalyptic number.

It is an amenable number.

7647120256 is an abundant number, since it is smaller than the sum of its proper divisors (7796087744).

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

7647120256 is an equidigital number, since it uses as much as digits as its factorization.

7647120256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818486 (or 818474 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 7647120256 is about 87447.8144724041. The cubic root of 7647120256 is about 1970.1500616620.

The spelling of 7647120256 in words is "seven billion, six hundred forty-seven million, one hundred twenty thousand, two hundred fifty-six".