4640431665 has 16 divisors (see below), whose sum is σ = 7680715200. Its totient is φ = 2389555392.

The previous prime is 4640431651. The next prime is 4640431667. The reversal of 4640431665 is 5661340464.

It is a de Polignac number, because none of the positive numbers 2^k-4640431665 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4640431667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5333395 + ... + 5334264.

It is an arithmetic number, because the mean of its divisors is an integer number (480044700).

Almost surely, 2^4640431665 is an apocalyptic number.

It is an amenable number.

4640431665 is a deficient number, since it is larger than the sum of its proper divisors (3040283535).

4640431665 is a wasteful number, since it uses less digits than its factorization.

4640431665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10667696.

The product of its (nonzero) digits is 207360, while the sum is 39.

The square root of 4640431665 is about 68120.7139202167. The cubic root of 4640431665 is about 1667.9619040664.

The spelling of 4640431665 in words is "four billion, six hundred forty million, four hundred thirty-one thousand, six hundred sixty-five".