161605555000005 has 16 divisors (see below), whose sum is σ = 266909819871744. Its totient is φ = 83409318709440.

The previous prime is 161605554999997. The next prime is 161605555000039. The reversal of 161605555000005 is 500000555506161.

It is not a de Polignac number, because 161605555000005 - 2³ = 161605554999997 is a prime.

It is a super-2 number, since 2×161605555000005² (a number of 29 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173769413514 + ... + 173769414443.

It is an arithmetic number, because the mean of its divisors is an integer number (16681863741984).

Almost surely, 2^{161605555000005} is an apocalyptic number.

161605555000005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161605555000005 is a deficient number, since it is larger than the sum of its proper divisors (105304264871739).

161605555000005 is a wasteful number, since it uses less digits than its factorization.

161605555000005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347538827996.

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 161605555000005 in words is "one hundred sixty-one trillion, six hundred five billion, five hundred fifty-five million, five", and thus it is an aban number.