161411504 has 20 divisors (see below), whose sum is σ = 313402560. Its totient is φ = 80533440.

The previous prime is 161411491. The next prime is 161411507. The reversal of 161411504 is 405114161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 161411504.

It is not an unprimeable number, because it can be changed into a prime (161411507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2867 + ... + 18194.

It is an arithmetic number, because the mean of its divisors is an integer number (15670128).

Almost surely, 2^161411504 is an apocalyptic number.

It is an amenable number.

161411504 is a deficient number, since it is larger than the sum of its proper divisors (151991056).

161411504 is a wasteful number, since it uses less digits than its factorization.

161411504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21548 (or 21542 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 161411504 is about 12704.7827214793. The cubic root of 161411504 is about 544.4752730873.

Adding to 161411504 its reverse (405114161), we get a palindrome (566525665).

The spelling of 161411504 in words is "one hundred sixty-one million, four hundred eleven thousand, five hundred four".