165114643522261 has 2 divisors, whose sum is σ = 165114643522262. Its totient is φ = 165114643522260.

The previous prime is 165114643522243. The next prime is 165114643522291. The reversal of 165114643522261 is 162225346411561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92466398243025 + 72648245279236 = 9615945^2 + 8523394^2 .

It is an emirp because it is prime and its reverse (162225346411561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 165114643522261 - 2⁵ = 165114643522229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165114643522291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82557321761130 + 82557321761131.

It is an arithmetic number, because the mean of its divisors is an integer number (82557321761131).

Almost surely, 2^{165114643522261} is an apocalyptic number.

It is an amenable number.

165114643522261 is a deficient number, since it is larger than the sum of its proper divisors (1).

165114643522261 is an equidigital number, since it uses as much as digits as its factorization.

165114643522261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2073600, while the sum is 49.

The spelling of 165114643522261 in words is "one hundred sixty-five trillion, one hundred fourteen billion, six hundred forty-three million, five hundred twenty-two thousand, two hundred sixty-one".