165220316124404 has 12 divisors (see below), whose sum is σ = 289252281355044. Its totient is φ = 82576807165824.

The previous prime is 165220316124397. The next prime is 165220316124431. The reversal of 165220316124404 is 404421613022561.

It can be written as a sum of positive squares in 2 ways, for example, as 54291815416804 + 110928500707600 = 7368298^2 + 10532260^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8337712949 + ... + 8337732764.

It is an arithmetic number, because the mean of its divisors is an integer number (24104356779587).

Almost surely, 2^{165220316124404} is an apocalyptic number.

It is an amenable number.

165220316124404 is a deficient number, since it is larger than the sum of its proper divisors (124031965230640).

165220316124404 is a wasteful number, since it uses less digits than its factorization.

165220316124404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16675448194 (or 16675448192 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 41.

Adding to 165220316124404 its reverse (404421613022561), we get a palindrome (569641929146965).

The spelling of 165220316124404 in words is "one hundred sixty-five trillion, two hundred twenty billion, three hundred sixteen million, one hundred twenty-four thousand, four hundred four".