2011165050689 has 2 divisors, whose sum is σ = 2011165050690. Its totient is φ = 2011165050688.

The previous prime is 2011165050607. The next prime is 2011165050731. The reversal of 2011165050689 is 9860505611102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1536030560689 + 475134490000 = 1239367^2 + 689300^2 .

It is a cyclic number.

It is not a de Polignac number, because 2011165050689 - 2¹² = 2011165046593 is a prime.

It is a super-2 number, since 2×2011165050689² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2011165050289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1005582525344 + 1005582525345.

It is an arithmetic number, because the mean of its divisors is an integer number (1005582525345).

Almost surely, 2^{2011165050689} is an apocalyptic number.

It is an amenable number.

2011165050689 is a deficient number, since it is larger than the sum of its proper divisors (1).

2011165050689 is an equidigital number, since it uses as much as digits as its factorization.

2011165050689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 44.

The spelling of 2011165050689 in words is "two trillion, eleven billion, one hundred sixty-five million, fifty thousand, six hundred eighty-nine".