489784644863 has 4 divisors (see below), whose sum is σ = 505584149568. Its totient is φ = 473985140160.

The previous prime is 489784644841. The next prime is 489784644913. The reversal of 489784644863 is 368446487984.

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

It is a cyclic number.

It is not a de Polignac number, because 489784644863 - 2²⁸ = 489516209407 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 (489784644823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7899752306 + ... + 7899752367.

It is an arithmetic number, because the mean of its divisors is an integer number (126396037392).

Almost surely, 2^489784644863 is an apocalyptic number.

489784644863 is a deficient number, since it is larger than the sum of its proper divisors (15799504705).

489784644863 is a wasteful number, since it uses less digits than its factorization.

489784644863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15799504704.

The product of its digits is 891813888, while the sum is 71.

The spelling of 489784644863 in words is "four hundred eighty-nine billion, seven hundred eighty-four million, six hundred forty-four thousand, eight hundred sixty-three".