168165165015641 has 2 divisors, whose sum is σ = 168165165015642. Its totient is φ = 168165165015640.

The previous prime is 168165165015619. The next prime is 168165165015667. The reversal of 168165165015641 is 146510561561861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107400474096400 + 60764690919241 = 10363420^2 + 7795171^2 .

It is a cyclic number.

It is not a de Polignac number, because 168165165015641 - 2¹⁴ = 168165164999257 is a prime.

It is not a weakly prime, because it can be changed into another prime (168165165012641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84082582507820 + 84082582507821.

It is an arithmetic number, because the mean of its divisors is an integer number (84082582507821).

Almost surely, 2^{168165165015641} is an apocalyptic number.

It is an amenable number.

168165165015641 is a deficient number, since it is larger than the sum of its proper divisors (1).

168165165015641 is an equidigital number, since it uses as much as digits as its factorization.

168165165015641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184000, while the sum is 56.

The spelling of 168165165015641 in words is "one hundred sixty-eight trillion, one hundred sixty-five billion, one hundred sixty-five million, fifteen thousand, six hundred forty-one".