64640765324 has 12 divisors (see below), whose sum is σ = 113319454248. Its totient is φ = 32263778400.

The previous prime is 64640765291. The next prime is 64640765377. The reversal of 64640765324 is 42356704646.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14148497 + ... + 14153064.

It is an arithmetic number, because the mean of its divisors is an integer number (9443287854).

Almost surely, 2^64640765324 is an apocalyptic number.

It is an amenable number.

64640765324 is a deficient number, since it is larger than the sum of its proper divisors (48678688924).

64640765324 is a wasteful number, since it uses less digits than its factorization.

64640765324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28302136 (or 28302134 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 64640765324 in words is "sixty-four billion, six hundred forty million, seven hundred sixty-five thousand, three hundred twenty-four".