4631645989 has 4 divisors (see below), whose sum is σ = 4632133324. Its totient is φ = 4631158656.

The previous prime is 4631645987. The next prime is 4631646031. The reversal of 4631645989 is 9895461364.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2786256225 + 1845389764 = 52785^2 + 42958^2 .

It is a cyclic number.

It is not a de Polignac number, because 4631645989 - 2¹ = 4631645987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4631645987) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 229122 + ... + 248515.

It is an arithmetic number, because the mean of its divisors is an integer number (1158033331).

Almost surely, 2^4631645989 is an apocalyptic number.

It is an amenable number.

4631645989 is a deficient number, since it is larger than the sum of its proper divisors (487335).

4631645989 is an equidigital number, since it uses as much as digits as its factorization.

4631645989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487334.

The product of its digits is 5598720, while the sum is 55.

The square root of 4631645989 is about 68056.1972857726. The cubic root of 4631645989 is about 1666.9085946719.

The spelling of 4631645989 in words is "four billion, six hundred thirty-one million, six hundred forty-five thousand, nine hundred eighty-nine".