204113512005643 has 4 divisors (see below), whose sum is σ = 204113695591840. Its totient is φ = 204113328419448.

The previous prime is 204113512005629. The next prime is 204113512005649. The reversal of 204113512005643 is 346500215311402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204113512005643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204113512005649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90115155 + ... + 92352412.

It is an arithmetic number, because the mean of its divisors is an integer number (51028423897960).

Almost surely, 2^{204113512005643} is an apocalyptic number.

204113512005643 is a deficient number, since it is larger than the sum of its proper divisors (183586197).

204113512005643 is a wasteful number, since it uses less digits than its factorization.

204113512005643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183586196.

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 204113512005643 in words is "two hundred four trillion, one hundred thirteen billion, five hundred twelve million, five thousand, six hundred forty-three".