489655659791 has 2 divisors, whose sum is σ = 489655659792. Its totient is φ = 489655659790.

The previous prime is 489655659761. The next prime is 489655659797. The reversal of 489655659791 is 197956556984.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-489655659791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (489655659797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 244827829895 + 244827829896.

It is an arithmetic number, because the mean of its divisors is an integer number (244827829896).

Almost surely, 2^489655659791 is an apocalyptic number.

489655659791 is a deficient number, since it is larger than the sum of its proper divisors (1).

489655659791 is an equidigital number, since it uses as much as digits as its factorization.

489655659791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 734832000, while the sum is 74.

The spelling of 489655659791 in words is "four hundred eighty-nine billion, six hundred fifty-five million, six hundred fifty-nine thousand, seven hundred ninety-one".