161345132224 has 56 divisors (see below), whose sum is σ = 325707816960. Its totient is φ = 79288909056.

The previous prime is 161345132183. The next prime is 161345132237. The reversal of 161345132224 is 422231543161.

It is a self number, because there is not a number n which added to its sum of digits gives 161345132224.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 776937 + ... + 962455.

Almost surely, 2^161345132224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161345132224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162853908480).

161345132224 is an abundant number, since it is smaller than the sum of its proper divisors (164362684736).

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

161345132224 is a wasteful number, since it uses less digits than its factorization.

161345132224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185765 (or 185755 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

Adding to 161345132224 its reverse (422231543161), we get a palindrome (583576675385).

The spelling of 161345132224 in words is "one hundred sixty-one billion, three hundred forty-five million, one hundred thirty-two thousand, two hundred twenty-four".