204331771643 has 8 divisors (see below), whose sum is σ = 216356226768. Its totient is φ = 192307865344.

The previous prime is 204331771607. The next prime is 204331771697. The reversal of 204331771643 is 346177133402.

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 204331771643 - 2¹² = 204331767547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204331771643.

It is not an unprimeable number, because it can be changed into a prime (204331771603) 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, 820280 + ... + 1039962.

It is an arithmetic number, because the mean of its divisors is an integer number (27044528346).

Almost surely, 2^204331771643 is an apocalyptic number.

204331771643 is a deficient number, since it is larger than the sum of its proper divisors (12024455125).

204331771643 is a wasteful number, since it uses less digits than its factorization.

204331771643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274413.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 204331771643 in words is "two hundred four billion, three hundred thirty-one million, seven hundred seventy-one thousand, six hundred forty-three".