2165273576369 has 2 divisors, whose sum is σ = 2165273576370. Its totient is φ = 2165273576368.

The previous prime is 2165273576339. The next prime is 2165273576441. The reversal of 2165273576369 is 9636753725612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1647852313969 + 517421262400 = 1283687^2 + 719320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165273576369 - 2²⁸ = 2165005140913 is a prime.

It is a super-2 number, since 2×2165273576369² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2165273576339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082636788184 + 1082636788185.

It is an arithmetic number, because the mean of its divisors is an integer number (1082636788185).

Almost surely, 2^{2165273576369} is an apocalyptic number.

It is an amenable number.

2165273576369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165273576369 is an equidigital number, since it uses as much as digits as its factorization.

2165273576369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 85730400, while the sum is 62.

The spelling of 2165273576369 in words is "two trillion, one hundred sixty-five billion, two hundred seventy-three million, five hundred seventy-six thousand, three hundred sixty-nine".