204919678143 has 8 divisors (see below), whose sum is σ = 303584708400. Its totient is φ = 136613118744.

The previous prime is 204919678141. The next prime is 204919678151. The reversal of 204919678143 is 341876919402.

204919678143 is a `hidden beast` number, since 2 + 0 + 491 + 9 + 6 + 7 + 8 + 143 = 666.

It is not a de Polignac number, because 204919678143 - 2¹ = 204919678141 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204919678143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204919678141) 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, 3794808828 + ... + 3794808881.

It is an arithmetic number, because the mean of its divisors is an integer number (37948088550).

Almost surely, 2^204919678143 is an apocalyptic number.

204919678143 is a deficient number, since it is larger than the sum of its proper divisors (98665030257).

204919678143 is an equidigital number, since it uses as much as digits as its factorization.

204919678143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7589617718 (or 7589617712 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The spelling of 204919678143 in words is "two hundred four billion, nine hundred nineteen million, six hundred seventy-eight thousand, one hundred forty-three".