161654163 has 16 divisors (see below), whose sum is σ = 236549376. Its totient is φ = 97382240.

The previous prime is 161654117. The next prime is 161654179. The reversal of 161654163 is 361456161.

It is a cyclic number.

It is not a de Polignac number, because 161654163 - 2⁸ = 161653907 is a prime.

It is a super-2 number, since 2×161654163² = 52264136830461138, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (161654263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9156 + ... + 20177.

It is an arithmetic number, because the mean of its divisors is an integer number (14784336).

Almost surely, 2^161654163 is an apocalyptic number.

161654163 is a deficient number, since it is larger than the sum of its proper divisors (74895213).

161654163 is a wasteful number, since it uses less digits than its factorization.

161654163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29514.

The product of its digits is 12960, while the sum is 33.

The square root of 161654163 is about 12714.3290424623. The cubic root of 161654163 is about 544.7479832485.

The spelling of 161654163 in words is "one hundred sixty-one million, six hundred fifty-four thousand, one hundred sixty-three".