161623446 has 8 divisors (see below), whose sum is σ = 323246904. Its totient is φ = 53874480.

The previous prime is 161623439. The next prime is 161623489. The reversal of 161623446 is 644326161.

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

161623446 is an admirable number.

It is a super-2 number, since 2×161623446² = 52244276593829832, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 13468615 + ... + 13468626.

It is an arithmetic number, because the mean of its divisors is an integer number (40405863).

Almost surely, 2^161623446 is an apocalyptic number.

161623446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161623446 is a wasteful number, since it uses less digits than its factorization.

161623446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26937246.

The product of its digits is 20736, while the sum is 33.

The square root of 161623446 is about 12713.1210172797. The cubic root of 161623446 is about 544.7134773142.

The spelling of 161623446 in words is "one hundred sixty-one million, six hundred twenty-three thousand, four hundred forty-six".