161549363 has 8 divisors (see below), whose sum is σ = 166381632. Its totient is φ = 156741696.

The previous prime is 161549347. The next prime is 161549369. The reversal of 161549363 is 363945161.

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

It is a cyclic number.

It is not a de Polignac number, because 161549363 - 2⁴ = 161549347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161549369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7631 + ... + 19527.

It is an arithmetic number, because the mean of its divisors is an integer number (20797704).

Almost surely, 2^161549363 is an apocalyptic number.

161549363 is a deficient number, since it is larger than the sum of its proper divisors (4832269).

161549363 is a wasteful number, since it uses less digits than its factorization.

161549363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12301.

The product of its digits is 58320, while the sum is 38.

The square root of 161549363 is about 12710.2070400132. The cubic root of 161549363 is about 544.6302382035.

The spelling of 161549363 in words is "one hundred sixty-one million, five hundred forty-nine thousand, three hundred sixty-three".