161163171854 has 8 divisors (see below), whose sum is σ = 241880042808. Its totient is φ = 80536490920.

The previous prime is 161163171817. The next prime is 161163171881. The reversal of 161163171854 is 458171361161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22543037 + ... + 22550184.

It is an arithmetic number, because the mean of its divisors is an integer number (30235005351).

Almost surely, 2^161163171854 is an apocalyptic number.

161163171854 is a deficient number, since it is larger than the sum of its proper divisors (80716870954).

161163171854 is a wasteful number, since it uses less digits than its factorization.

161163171854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45095010.

The product of its digits is 120960, while the sum is 44.

The spelling of 161163171854 in words is "one hundred sixty-one billion, one hundred sixty-three million, one hundred seventy-one thousand, eight hundred fifty-four".