489658000081 has 4 divisors (see below), whose sum is σ = 489664682164. Its totient is φ = 489651318000.

The previous prime is 489658000063. The next prime is 489658000151. The reversal of 489658000081 is 180000856984.

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 229042645056 + 260615355025 = 478584^2 + 510505^2 .

It is a cyclic number.

It is not a de Polignac number, because 489658000081 - 2⁷ = 489657999953 is a prime.

It is a super-2 number, since 2×489658000081² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 489657999989 and 489658000034.

It is not an unprimeable number, because it can be changed into a prime (489658009081) 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, 3229890 + ... + 3378091.

It is an arithmetic number, because the mean of its divisors is an integer number (122416170541).

Almost surely, 2^489658000081 is an apocalyptic number.

It is an amenable number.

489658000081 is a deficient number, since it is larger than the sum of its proper divisors (6682083).

489658000081 is an equidigital number, since it uses as much as digits as its factorization.

489658000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682082.

The product of its (nonzero) digits is 552960, while the sum is 49.

The spelling of 489658000081 in words is "four hundred eighty-nine billion, six hundred fifty-eight million, eighty-one", and thus it is an aban number.