489620166021 has 32 divisors (see below), whose sum is σ = 829476721920. Its totient is φ = 279617510592.

The previous prime is 489620166019. The next prime is 489620166023. The reversal of 489620166021 is 120661026984.

489620166021 is a `hidden beast` number, since 4 + 8 + 9 + 6 + 20 + 16 + 602 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (489620166019) and next prime (489620166023).

It is not a de Polignac number, because 489620166021 - 2¹ = 489620166019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489620166023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445110 + ... + 1085063.

It is an arithmetic number, because the mean of its divisors is an integer number (25921147560).

Almost surely, 2^489620166021 is an apocalyptic number.

It is an amenable number.

489620166021 is a deficient number, since it is larger than the sum of its proper divisors (339856555899).

489620166021 is a wasteful number, since it uses less digits than its factorization.

489620166021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531882 (or 1531876 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 489620166021 in words is "four hundred eighty-nine billion, six hundred twenty million, one hundred sixty-six thousand, twenty-one".