3945520864 has 24 divisors (see below), whose sum is σ = 7811150760. Its totient is φ = 1961736576.

The previous prime is 3945520853. The next prime is 3945520879. The reversal of 3945520864 is 4680255493.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 338679 + ... + 350134.

It is an arithmetic number, because the mean of its divisors is an integer number (325464615).

Almost surely, 2^3945520864 is an apocalyptic number.

It is an amenable number.

3945520864 is a deficient number, since it is larger than the sum of its proper divisors (3865629896).

3945520864 is a wasteful number, since it uses less digits than its factorization.

3945520864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689002 (or 688994 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 46.

The square root of 3945520864 is about 62813.3812495395. The cubic root of 3945520864 is about 1580.1613978158.

The spelling of 3945520864 in words is "three billion, nine hundred forty-five million, five hundred twenty thousand, eight hundred sixty-four".