16442047171165 has 36 divisors (see below), whose sum is σ = 25227962859708. Its totient is φ = 10249587828480.

The previous prime is 16442047171139. The next prime is 16442047171211. The reversal of 16442047171165 is 56117174024461.

It can be written as a sum of positive squares in 2 ways, for example, as 12289084125241 + 4152963045924 = 3505579^2 + 2037882^2 .

It is not a de Polignac number, because 16442047171165 - 2⁵ = 16442047171133 is a prime.

It is a super-3 number, since 3×16442047171165³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

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 35 ways as a sum of consecutive naturals, for example, 277286044 + ... + 277345333.

It is an arithmetic number, because the mean of its divisors is an integer number (700776746103).

Almost surely, 2^{16442047171165} is an apocalyptic number.

It is an amenable number.

16442047171165 is a deficient number, since it is larger than the sum of its proper divisors (8785915688543).

16442047171165 is a wasteful number, since it uses less digits than its factorization.

16442047171165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554631418 (or 554631400 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 16442047171165 in words is "sixteen trillion, four hundred forty-two billion, forty-seven million, one hundred seventy-one thousand, one hundred sixty-five".