2165006311289 has 2 divisors, whose sum is σ = 2165006311290. Its totient is φ = 2165006311288.

The previous prime is 2165006311283. The next prime is 2165006311333. The reversal of 2165006311289 is 9821136005612.

It is a happy number.

It is an a-pointer prime, because the next prime (2165006311333) can be obtained adding 2165006311289 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1915226262889 + 249780048400 = 1383917^2 + 499780^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165006311289 - 2⁸ = 2165006311033 is a prime.

It is not a weakly prime, because it can be changed into another prime (2165006311283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082503155644 + 1082503155645.

It is an arithmetic number, because the mean of its divisors is an integer number (1082503155645).

Almost surely, 2^{2165006311289} is an apocalyptic number.

It is an amenable number.

2165006311289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165006311289 is an equidigital number, since it uses as much as digits as its factorization.

2165006311289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 2165006311289 in words is "two trillion, one hundred sixty-five billion, six million, three hundred eleven thousand, two hundred eighty-nine".