204161878 has 16 divisors (see below), whose sum is σ = 330225840. Its totient is φ = 94348800.

The previous prime is 204161873. The next prime is 204161879. The reversal of 204161878 is 878161402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204161873) 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 in 7 ways as a sum of consecutive naturals, for example, 63963 + ... + 67078.

It is an arithmetic number, because the mean of its divisors is an integer number (20639115).

Almost surely, 2^204161878 is an apocalyptic number.

204161878 is a deficient number, since it is larger than the sum of its proper divisors (126063962).

204161878 is a wasteful number, since it uses less digits than its factorization.

204161878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131103.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 204161878 is about 14288.5225968257. The cubic root of 204161878 is about 588.8321993107.

The spelling of 204161878 in words is "two hundred four million, one hundred sixty-one thousand, eight hundred seventy-eight".