161616363 has 8 divisors (see below), whose sum is σ = 215840208. Its totient is φ = 107568384.

The previous prime is 161616353. The next prime is 161616419. The reversal of 161616363 is 363616161.

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

It is not a de Polignac number, because 161616363 - 2⁴ = 161616347 is a prime.

It is a super-3 number, since 3×161616363³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 (161616353) 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 7 ways as a sum of consecutive naturals, for example, 41806 + ... + 45507.

It is an arithmetic number, because the mean of its divisors is an integer number (26980026).

Almost surely, 2^161616363 is an apocalyptic number.

161616363 is a deficient number, since it is larger than the sum of its proper divisors (54223845).

161616363 is an equidigital number, since it uses as much as digits as its factorization.

161616363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87933.

The product of its digits is 11664, while the sum is 33.

The square root of 161616363 is about 12712.8424437653. The cubic root of 161616363 is about 544.7055200077.

The spelling of 161616363 in words is "one hundred sixty-one million, six hundred sixteen thousand, three hundred sixty-three".