7644321264 has 40 divisors (see below), whose sum is σ = 19752066640. Its totient is φ = 2547560448.

The previous prime is 7644321257. The next prime is 7644321277. The reversal of 7644321264 is 4621234467.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 253014 + ... + 281610.

It is an arithmetic number, because the mean of its divisors is an integer number (493801666).

Almost surely, 2^7644321264 is an apocalyptic number.

It is an amenable number.

7644321264 is an abundant number, since it is smaller than the sum of its proper divisors (12107745376).

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

7644321264 is a wasteful number, since it uses less digits than its factorization.

7644321264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34177 (or 34171 counting only the distinct ones).

The product of its digits is 193536, while the sum is 39.

The square root of 7644321264 is about 87431.8092229596. The cubic root of 7644321264 is about 1969.9096614848.

The spelling of 7644321264 in words is "seven billion, six hundred forty-four million, three hundred twenty-one thousand, two hundred sixty-four".