3964646825 has 6 divisors (see below), whose sum is σ = 4916162094. Its totient is φ = 3171717440.

The previous prime is 3964646809. The next prime is 3964646831. The reversal of 3964646825 is 5286464693.

It can be written as a sum of positive squares in 3 ways, for example, as 373880896 + 3590765929 = 19336^2 + 59923^2 .

It is not a de Polignac number, because 3964646825 - 2⁴ = 3964646809 is a prime.

It is a Duffinian number.

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 5 ways as a sum of consecutive naturals, for example, 79292912 + ... + 79292961.

It is an arithmetic number, because the mean of its divisors is an integer number (819360349).

Almost surely, 2^3964646825 is an apocalyptic number.

It is an amenable number.

3964646825 is a deficient number, since it is larger than the sum of its proper divisors (951515269).

3964646825 is a wasteful number, since it uses less digits than its factorization.

3964646825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158585883 (or 158585878 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 53.

The square root of 3964646825 is about 62965.4415135795. The cubic root of 3964646825 is about 1582.7105671472.

The spelling of 3964646825 in words is "three billion, nine hundred sixty-four million, six hundred forty-six thousand, eight hundred twenty-five".