3941531664 has 40 divisors (see below), whose sum is σ = 11636904000. Its totient is φ = 1126151808.

The previous prime is 3941531621. The next prime is 3941531681. The reversal of 3941531664 is 4661351493.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5865039 + ... + 5865710.

It is an arithmetic number, because the mean of its divisors is an integer number (290922600).

Almost surely, 2^3941531664 is an apocalyptic number.

It is an amenable number.

3941531664 is an abundant number, since it is smaller than the sum of its proper divisors (7695372336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3941531664 is a wasteful number, since it uses less digits than its factorization.

3941531664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11730767 (or 11730761 counting only the distinct ones).

The product of its digits is 233280, while the sum is 42.

The square root of 3941531664 is about 62781.6188386378. The cubic root of 3941531664 is about 1579.6286666747.

The spelling of 3941531664 in words is "three billion, nine hundred forty-one million, five hundred thirty-one thousand, six hundred sixty-four".