165561151060489 has 2 divisors, whose sum is σ = 165561151060490. Its totient is φ = 165561151060488.

The previous prime is 165561151060471. The next prime is 165561151060523. The reversal of 165561151060489 is 984060151165561.

165561151060489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132591540225600 + 32969610834889 = 11514840^2 + 5741917^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165561151060489 is a prime.

It is not a weakly prime, because it can be changed into another prime (165561151066489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82780575530244 + 82780575530245.

It is an arithmetic number, because the mean of its divisors is an integer number (82780575530245).

Almost surely, 2^{165561151060489} is an apocalyptic number.

It is an amenable number.

165561151060489 is a deficient number, since it is larger than the sum of its proper divisors (1).

165561151060489 is an equidigital number, since it uses as much as digits as its factorization.

165561151060489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776000, while the sum is 58.

The spelling of 165561151060489 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, one hundred fifty-one million, sixty thousand, four hundred eighty-nine".