161605555000006 has 12 divisors (see below), whose sum is σ = 262489496139612. Its totient is φ = 74587179230616.

The previous prime is 161605554999997. The next prime is 161605555000039. The reversal of 161605555000006 is 600000555506161.

It is a super-2 number, since 2×161605555000006² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239061471556 + ... + 239061472231.

It is an arithmetic number, because the mean of its divisors is an integer number (21874124678301).

Almost surely, 2^{161605555000006} is an apocalyptic number.

161605555000006 is a deficient number, since it is larger than the sum of its proper divisors (100883941139606).

161605555000006 is a wasteful number, since it uses less digits than its factorization.

161605555000006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478122943815 (or 478122943802 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 161605555000006 in words is "one hundred sixty-one trillion, six hundred five billion, five hundred fifty-five million, six", and thus it is an aban number.