204779142873 has 32 divisors (see below), whose sum is σ = 311648238720. Its totient is φ = 132798864960.

The previous prime is 204779142847. The next prime is 204779142917. The reversal of 204779142873 is 378241977402.

204779142873 is a `hidden beast` number, since 2 + 0 + 477 + 91 + 4 + 2 + 87 + 3 = 666.

It is not a de Polignac number, because 204779142873 - 2¹⁸ = 204778880729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204779142823) 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, 4760803 + ... + 4803623.

It is an arithmetic number, because the mean of its divisors is an integer number (9739007460).

Almost surely, 2^204779142873 is an apocalyptic number.

It is an amenable number.

204779142873 is a deficient number, since it is larger than the sum of its proper divisors (106869095847).

204779142873 is a wasteful number, since it uses less digits than its factorization.

204779142873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47654 (or 47648 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 54.

The spelling of 204779142873 in words is "two hundred four billion, seven hundred seventy-nine million, one hundred forty-two thousand, eight hundred seventy-three".