16161942855717 has 6 divisors (see below), whose sum is σ = 23345028569382. Its totient is φ = 10774628570472.

The previous prime is 16161942855713. The next prime is 16161942855761. The reversal of 16161942855717 is 71755824916161.

16161942855717 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 19 + 42 + 8 + 5 + 571 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15594924819681 + 567018036036 = 3949041^2 + 753006^2 .

It is not a de Polignac number, because 16161942855717 - 2² = 16161942855713 is a prime.

It is a super-2 number, since 2×16161942855717² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16161942855713) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897885714198 + ... + 897885714215.

It is an arithmetic number, because the mean of its divisors is an integer number (3890838094897).

Almost surely, 2^{16161942855717} is an apocalyptic number.

It is an amenable number.

16161942855717 is a deficient number, since it is larger than the sum of its proper divisors (7183085713665).

16161942855717 is a wasteful number, since it uses less digits than its factorization.

16161942855717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795771428419 (or 1795771428416 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 63.

The spelling of 16161942855717 in words is "sixteen trillion, one hundred sixty-one billion, nine hundred forty-two million, eight hundred fifty-five thousand, seven hundred seventeen".