204263236101643 has 4 divisors (see below), whose sum is σ = 205077033855288. Its totient is φ = 203449438348000.

The previous prime is 204263236101581. The next prime is 204263236101649. The reversal of 204263236101643 is 346101632362402.

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

It is a cyclic number.

It is not a de Polignac number, because 204263236101643 - 2²⁹ = 204262699230731 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 204263236101643.

It is not an unprimeable number, because it can be changed into a prime (204263236101649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406898876446 + ... + 406898876947.

It is an arithmetic number, because the mean of its divisors is an integer number (51269258463822).

Almost surely, 2^{204263236101643} is an apocalyptic number.

204263236101643 is a deficient number, since it is larger than the sum of its proper divisors (813797753645).

204263236101643 is an equidigital number, since it uses as much as digits as its factorization.

204263236101643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813797753644.

The product of its (nonzero) digits is 746496, while the sum is 43.

The spelling of 204263236101643 in words is "two hundred four trillion, two hundred sixty-three billion, two hundred thirty-six million, one hundred one thousand, six hundred forty-three".