161109952 has 28 divisors (see below), whose sum is σ = 338510880. Its totient is φ = 75815936.

The previous prime is 161109931. The next prime is 161109953. The reversal of 161109952 is 259901161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161109953) 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 3 ways as a sum of consecutive naturals, for example, 72952 + ... + 75127.

Almost surely, 2^161109952 is an apocalyptic number.

It is an amenable number.

161109952 is an abundant number, since it is smaller than the sum of its proper divisors (177400928).

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

161109952 is a wasteful number, since it uses less digits than its factorization.

161109952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148108 (or 148098 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 34.

The square root of 161109952 is about 12692.9095167341. The cubic root of 161109952 is about 544.1359954112.

It can be divided in two parts, 16110 and 9952, that added together give a palindrome (26062).

The spelling of 161109952 in words is "one hundred sixty-one million, one hundred nine thousand, nine hundred fifty-two".