204161656 has 16 divisors (see below), whose sum is σ = 386521200. Its totient is φ = 101089344.

The previous prime is 204161651. The next prime is 204161681. The reversal of 204161656 is 656161402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204161651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123061 + ... + 124708.

It is an arithmetic number, because the mean of its divisors is an integer number (24157575).

Almost surely, 2^204161656 is an apocalyptic number.

It is an amenable number.

204161656 is a deficient number, since it is larger than the sum of its proper divisors (182359544).

204161656 is a wasteful number, since it uses less digits than its factorization.

204161656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247878 (or 247874 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 204161656 is about 14288.5148283508. The cubic root of 204161656 is about 588.8319858840.

The spelling of 204161656 in words is "two hundred four million, one hundred sixty-one thousand, six hundred fifty-six".