489311861771 has 4 divisors (see below), whose sum is σ = 493642055352. Its totient is φ = 484981668192.

The previous prime is 489311861761. The next prime is 489311861803. The reversal of 489311861771 is 177168113984.

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 489311861771 - 2¹⁸ = 489311599627 is a prime.

It is a super-2 number, since 2×489311861771² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489311861711) 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, 2165096621 + ... + 2165096846.

It is an arithmetic number, because the mean of its divisors is an integer number (123410513838).

Almost surely, 2^489311861771 is an apocalyptic number.

489311861771 is a deficient number, since it is larger than the sum of its proper divisors (4330193581).

489311861771 is a wasteful number, since it uses less digits than its factorization.

489311861771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4330193580.

The product of its digits is 2032128, while the sum is 56.

The spelling of 489311861771 in words is "four hundred eighty-nine billion, three hundred eleven million, eight hundred sixty-one thousand, seven hundred seventy-one".