168541012069 has 2 divisors, whose sum is σ = 168541012070. Its totient is φ = 168541012068.

The previous prime is 168541012063. The next prime is 168541012091. The reversal of 168541012069 is 960210145861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146788596900 + 21752415169 = 383130^2 + 147487^2 .

It is an emirp because it is prime and its reverse (960210145861) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 168541012069 - 2¹⁷ = 168540880997 is a prime.

It is a super-2 number, since 2×168541012069² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168541012063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84270506034 + 84270506035.

It is an arithmetic number, because the mean of its divisors is an integer number (84270506035).

Almost surely, 2^168541012069 is an apocalyptic number.

It is an amenable number.

168541012069 is a deficient number, since it is larger than the sum of its proper divisors (1).

168541012069 is an equidigital number, since it uses as much as digits as its factorization.

168541012069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The spelling of 168541012069 in words is "one hundred sixty-eight billion, five hundred forty-one million, twelve thousand, sixty-nine".