165121576772105 has 16 divisors (see below), whose sum is σ = 214211775276480. Its totient is φ = 121762482783552.

The previous prime is 165121576772077. The next prime is 165121576772153. The reversal of 165121576772105 is 501277675121561.

It is a cyclic number.

It is not a de Polignac number, because 165121576772105 - 2⁴² = 160723530261001 is a prime.

It is a super-2 number, since 2×165121576772105² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 23488129739 + ... + 23488136768.

It is an arithmetic number, because the mean of its divisors is an integer number (13388235954780).

Almost surely, 2^{165121576772105} is an apocalyptic number.

It is an amenable number.

165121576772105 is a deficient number, since it is larger than the sum of its proper divisors (49090198504375).

165121576772105 is a wasteful number, since it uses less digits than its factorization.

165121576772105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46976266568.

The product of its (nonzero) digits is 6174000, while the sum is 56.

The spelling of 165121576772105 in words is "one hundred sixty-five trillion, one hundred twenty-one billion, five hundred seventy-six million, seven hundred seventy-two thousand, one hundred five".