154866852169 has 2 divisors, whose sum is σ = 154866852170. Its totient is φ = 154866852168.

The previous prime is 154866852167. The next prime is 154866852197. The reversal of 154866852169 is 961258668451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152427776400 + 2439075769 = 390420^2 + 49387^2 .

It is an emirp because it is prime and its reverse (961258668451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 154866852169 - 2¹ = 154866852167 is a prime.

It is a super-5 number, since 5×154866852169⁵ (a number of 57 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

Together with 154866852167, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (154866852167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77433426084 + 77433426085.

It is an arithmetic number, because the mean of its divisors is an integer number (77433426085).

Almost surely, 2^154866852169 is an apocalyptic number.

It is an amenable number.

154866852169 is a deficient number, since it is larger than the sum of its proper divisors (1).

154866852169 is an equidigital number, since it uses as much as digits as its factorization.

154866852169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24883200, while the sum is 61.

The spelling of 154866852169 in words is "one hundred fifty-four billion, eight hundred sixty-six million, eight hundred fifty-two thousand, one hundred sixty-nine".