204642875779 has 8 divisors (see below), whose sum is σ = 205910611200. Its totient is φ = 203377185600.

The previous prime is 204642875743. The next prime is 204642875831. The reversal of 204642875779 is 977578246402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204642875779 - 2⁷ = 204642875651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204642875279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310332 + ... + 711049.

It is an arithmetic number, because the mean of its divisors is an integer number (25738826400).

Almost surely, 2^204642875779 is an apocalyptic number.

204642875779 is a deficient number, since it is larger than the sum of its proper divisors (1267735421).

204642875779 is a wasteful number, since it uses less digits than its factorization.

204642875779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022621.

The product of its (nonzero) digits is 47416320, while the sum is 61.

The spelling of 204642875779 in words is "two hundred four billion, six hundred forty-two million, eight hundred seventy-five thousand, seven hundred seventy-nine".