204816158481 has 16 divisors (see below), whose sum is σ = 299073624768. Its totient is φ = 123648000000.

The previous prime is 204816158461. The next prime is 204816158489. The reversal of 204816158481 is 184851618402.

It is not a de Polignac number, because 204816158481 - 2³⁴ = 187636289297 is a prime.

It is a super-2 number, since 2×204816158481² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 204816158481.

It is not an unprimeable number, because it can be changed into a prime (204816158489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12066520 + ... + 12083481.

It is an arithmetic number, because the mean of its divisors is an integer number (18692101548).

Almost surely, 2^204816158481 is an apocalyptic number.

It is an amenable number.

204816158481 is a deficient number, since it is larger than the sum of its proper divisors (94257466287).

204816158481 is a wasteful number, since it uses less digits than its factorization.

204816158481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24150272.

The product of its (nonzero) digits is 491520, while the sum is 48.

The spelling of 204816158481 in words is "two hundred four billion, eight hundred sixteen million, one hundred fifty-eight thousand, four hundred eighty-one".