165381449080847 has 2 divisors, whose sum is σ = 165381449080848. Its totient is φ = 165381449080846.

The previous prime is 165381449080843. The next prime is 165381449080879. The reversal of 165381449080847 is 748080944183561.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 165381449080847 - 2² = 165381449080843 is a prime.

It is a super-2 number, since 2×165381449080847² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165381449080843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82690724540423 + 82690724540424.

It is an arithmetic number, because the mean of its divisors is an integer number (82690724540424).

Almost surely, 2^{165381449080847} is an apocalyptic number.

165381449080847 is a deficient number, since it is larger than the sum of its proper divisors (1).

165381449080847 is an equidigital number, since it uses as much as digits as its factorization.

165381449080847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 185794560, while the sum is 68.

The spelling of 165381449080847 in words is "one hundred sixty-five trillion, three hundred eighty-one billion, four hundred forty-nine million, eighty thousand, eight hundred forty-seven".