161568204 has 48 divisors (see below), whose sum is σ = 456196608. Its totient is φ = 43446528.

The previous prime is 161568203. The next prime is 161568217. The reversal of 161568204 is 402865161.

It is a super-3 number, since 3×161568204³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (161568203) 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, 55144 + ... + 57999.

It is an arithmetic number, because the mean of its divisors is an integer number (9504096).

Almost surely, 2^161568204 is an apocalyptic number.

161568204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161568204 is an abundant number, since it is smaller than the sum of its proper divisors (294628404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161568204 is a wasteful number, since it uses less digits than its factorization.

161568204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113174 (or 113172 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 161568204 is about 12710.9481943717. The cubic root of 161568204 is about 544.6514102243.

The spelling of 161568204 in words is "one hundred sixty-one million, five hundred sixty-eight thousand, two hundred four".