3921664575 has 12 divisors (see below), whose sum is σ = 6483818888. Its totient is φ = 2091554400.

The previous prime is 3921664561. The next prime is 3921664613. The reversal of 3921664575 is 5754661293.

It is not a de Polignac number, because 3921664575 - 2⁴ = 3921664559 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26144356 + ... + 26144505.

Almost surely, 2^3921664575 is an apocalyptic number.

3921664575 is a deficient number, since it is larger than the sum of its proper divisors (2562154313).

3921664575 is a wasteful number, since it uses less digits than its factorization.

3921664575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52288874 (or 52288869 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 48.

The square root of 3921664575 is about 62623.1951835740. The cubic root of 3921664575 is about 1576.9701824746.

The spelling of 3921664575 in words is "three billion, nine hundred twenty-one million, six hundred sixty-four thousand, five hundred seventy-five".