161100444 has 48 divisors (see below), whose sum is σ = 385257600. Its totient is φ = 52378176.

The previous prime is 161100437. The next prime is 161100463. The reversal of 161100444 is 444001161.

It is a self number, because there is not a number n which added to its sum of digits gives 161100444.

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 15 ways as a sum of consecutive naturals, for example, 97594 + ... + 99230.

It is an arithmetic number, because the mean of its divisors is an integer number (8026200).

Almost surely, 2^161100444 is an apocalyptic number.

It is an amenable number.

161100444 is an abundant number, since it is smaller than the sum of its proper divisors (224157156).

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

161100444 is a wasteful number, since it uses less digits than its factorization.

161100444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842 (or 1840 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 161100444 is about 12692.5349713916. The cubic root of 161100444 is about 544.1252910304.

The spelling of 161100444 in words is "one hundred sixty-one million, one hundred thousand, four hundred forty-four".