3964320513 has 6 divisors (see below), whose sum is σ = 5726240754. Its totient is φ = 2642880336.

The previous prime is 3964320511. The next prime is 3964320527. The reversal of 3964320513 is 3150234693.

It is a happy number.

3964320513 is a `hidden beast` number, since 3 + 9 + 643 + 2 + 0 + 5 + 1 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3607563969 + 356756544 = 60063^2 + 18888^2 .

It is not a de Polignac number, because 3964320513 - 2¹ = 3964320511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3964320511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 220240020 + ... + 220240037.

It is an arithmetic number, because the mean of its divisors is an integer number (954373459).

Almost surely, 2^3964320513 is an apocalyptic number.

It is an amenable number.

3964320513 is a deficient number, since it is larger than the sum of its proper divisors (1761920241).

3964320513 is a wasteful number, since it uses less digits than its factorization.

3964320513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440480063 (or 440480060 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 36.

The square root of 3964320513 is about 62962.8502610865. The cubic root of 3964320513 is about 1582.6671440595.

The spelling of 3964320513 in words is "three billion, nine hundred sixty-four million, three hundred twenty thousand, five hundred thirteen".