489291564921 has 8 divisors (see below), whose sum is σ = 661325585760. Its totient is φ = 321725960352.

The previous prime is 489291564917. The next prime is 489291564943. The reversal of 489291564921 is 129465192984.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 489291564921 - 2² = 489291564917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (489291564911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1117103811 + ... + 1117104248.

It is an arithmetic number, because the mean of its divisors is an integer number (82665698220).

Almost surely, 2^489291564921 is an apocalyptic number.

It is an amenable number.

489291564921 is a deficient number, since it is larger than the sum of its proper divisors (172034020839).

489291564921 is a wasteful number, since it uses less digits than its factorization.

489291564921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2234208135.

The product of its digits is 11197440, while the sum is 60.

The spelling of 489291564921 in words is "four hundred eighty-nine billion, two hundred ninety-one million, five hundred sixty-four thousand, nine hundred twenty-one".