161333656 has 24 divisors (see below), whose sum is σ = 332502660. Its totient is φ = 73333040.

The previous prime is 161333639. The next prime is 161333681. The reversal of 161333656 is 656333161.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 82366 + ... + 84301.

Almost surely, 2^161333656 is an apocalyptic number.

It is an amenable number.

161333656 is an abundant number, since it is smaller than the sum of its proper divisors (171169004).

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

161333656 is a wasteful number, since it uses less digits than its factorization.

161333656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166695 (or 166680 counting only the distinct ones).

The product of its digits is 29160, while the sum is 34.

The square root of 161333656 is about 12701.7186238713. The cubic root of 161333656 is about 544.3877264006.

The spelling of 161333656 in words is "one hundred sixty-one million, three hundred thirty-three thousand, six hundred fifty-six".