169981144 has 32 divisors (see below), whose sum is σ = 340516800. Its totient is φ = 79310880.

The previous prime is 169981139. The next prime is 169981199. The reversal of 169981144 is 441189961.

It is a self number, because there is not a number n which added to its sum of digits gives 169981144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1839 + ... + 18529.

It is an arithmetic number, because the mean of its divisors is an integer number (10641150).

Almost surely, 2^169981144 is an apocalyptic number.

It is an amenable number.

169981144 is an abundant number, since it is smaller than the sum of its proper divisors (170535656).

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

169981144 is a wasteful number, since it uses less digits than its factorization.

169981144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16783 (or 16779 counting only the distinct ones).

The product of its digits is 62208, while the sum is 43.

The square root of 169981144 is about 13037.6816957617. The cubic root of 169981144 is about 553.9453433895.

The spelling of 169981144 in words is "one hundred sixty-nine million, nine hundred eighty-one thousand, one hundred forty-four".