4644621817 has 48 divisors (see below), whose sum is σ = 5562805248. Its totient is φ = 3837901760.

The previous prime is 4644621811. The next prime is 4644621847. The reversal of 4644621817 is 7181264464.

It is a happy number.

It is not a de Polignac number, because 4644621817 - 2³ = 4644621809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4644621811) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 17660028 + ... + 17660290.

It is an arithmetic number, because the mean of its divisors is an integer number (115891776).

Almost surely, 2^4644621817 is an apocalyptic number.

It is an amenable number.

4644621817 is a deficient number, since it is larger than the sum of its proper divisors (918183431).

4644621817 is a wasteful number, since it uses less digits than its factorization.

4644621817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438 (or 409 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 4644621817 is about 68151.4623247367. The cubic root of 4644621817 is about 1668.4637906618.

The spelling of 4644621817 in words is "four billion, six hundred forty-four million, six hundred twenty-one thousand, eight hundred seventeen".