489157042081 has 2 divisors, whose sum is σ = 489157042082. Its totient is φ = 489157042080.

The previous prime is 489157042079. The next prime is 489157042097. The reversal of 489157042081 is 180240751984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431102549056 + 58054493025 = 656584^2 + 240945^2 .

It is a cyclic number.

It is not a de Polignac number, because 489157042081 - 2¹ = 489157042079 is a prime.

It is a super-2 number, since 2×489157042081² (a number of 24 digits) contains 22 as substring.

Together with 489157042079, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (489157042021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244578521040 + 244578521041.

It is an arithmetic number, because the mean of its divisors is an integer number (244578521041).

Almost surely, 2^489157042081 is an apocalyptic number.

It is an amenable number.

489157042081 is a deficient number, since it is larger than the sum of its proper divisors (1).

489157042081 is an equidigital number, since it uses as much as digits as its factorization.

489157042081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 49.

The spelling of 489157042081 in words is "four hundred eighty-nine billion, one hundred fifty-seven million, forty-two thousand, eighty-one".