204158631768 has 128 divisors (see below), whose sum is σ = 640033228800. Its totient is φ = 52828079616.

The previous prime is 204158631763. The next prime is 204158631791. The reversal of 204158631768 is 867136851402.

It is a self number, because there is not a number n which added to its sum of digits gives 204158631768.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204158631763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 766128 + ... + 997631.

It is an arithmetic number, because the mean of its divisors is an integer number (5000259600).

Almost surely, 2^204158631768 is an apocalyptic number.

204158631768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

204158631768 is an abundant number, since it is smaller than the sum of its proper divisors (435874597032).

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

204158631768 is a wasteful number, since it uses less digits than its factorization.

204158631768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763841 (or 1763837 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 204158631768 in words is "two hundred four billion, one hundred fifty-eight million, six hundred thirty-one thousand, seven hundred sixty-eight".