161528504 has 8 divisors (see below), whose sum is σ = 302865960. Its totient is φ = 80764248.

The previous prime is 161528501. The next prime is 161528513. The reversal of 161528504 is 405825161.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161528501) 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 as a sum of consecutive naturals, namely, 10095524 + ... + 10095539.

It is an arithmetic number, because the mean of its divisors is an integer number (37858245).

Almost surely, 2^161528504 is an apocalyptic number.

It is an amenable number.

161528504 is a deficient number, since it is larger than the sum of its proper divisors (141337456).

161528504 is a wasteful number, since it uses less digits than its factorization.

161528504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20191069 (or 20191065 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 161528504 is about 12709.3864525397. The cubic root of 161528504 is about 544.6067965942.

The spelling of 161528504 in words is "one hundred sixty-one million, five hundred twenty-eight thousand, five hundred four".