161528378 has 16 divisors (see below), whose sum is σ = 269944704. Its totient is φ = 71859360.

The previous prime is 161528369. The next prime is 161528401. The reversal of 161528378 is 873825161.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 77075 + ... + 79142.

It is an arithmetic number, because the mean of its divisors is an integer number (16871544).

Almost surely, 2^161528378 is an apocalyptic number.

161528378 is a deficient number, since it is larger than the sum of its proper divisors (108416326).

161528378 is a wasteful number, since it uses less digits than its factorization.

161528378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156277.

The product of its digits is 80640, while the sum is 41.

The square root of 161528378 is about 12709.3814955725. The cubic root of 161528378 is about 544.6066549877.

The spelling of 161528378 in words is "one hundred sixty-one million, five hundred twenty-eight thousand, three hundred seventy-eight".