3991650464 has 24 divisors (see below), whose sum is σ = 7934865120. Its totient is φ = 1976446656.

The previous prime is 3991650449. The next prime is 3991650547. The reversal of 3991650464 is 4640561993.

It is a happy number.

3991650464 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 602234 + ... + 608825.

It is an arithmetic number, because the mean of its divisors is an integer number (330619380).

Almost surely, 2^3991650464 is an apocalyptic number.

It is an amenable number.

3991650464 is a deficient number, since it is larger than the sum of its proper divisors (3943214656).

3991650464 is a wasteful number, since it uses less digits than its factorization.

3991650464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211172 (or 1211164 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 47.

The square root of 3991650464 is about 63179.5098429863. The cubic root of 3991650464 is about 1586.2957773811.

The spelling of 3991650464 in words is "three billion, nine hundred ninety-one million, six hundred fifty thousand, four hundred sixty-four".