204231686399 has 8 divisors (see below), whose sum is σ = 219948629712. Its totient is φ = 188515716480.

The previous prime is 204231686369. The next prime is 204231686401. The reversal of 204231686399 is 993686132402.

It is a Cunningham number, because it is equal to 451920²-1.

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

It is a de Polignac number, because none of the positive numbers 2^k-204231686399 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 204231686399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204231686369) 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, 225959 + ... + 677879.

It is an arithmetic number, because the mean of its divisors is an integer number (27493578714).

Almost surely, 2^204231686399 is an apocalyptic number.

204231686399 is a deficient number, since it is larger than the sum of its proper divisors (15716943313).

204231686399 is a wasteful number, since it uses less digits than its factorization.

204231686399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486697.

The product of its (nonzero) digits is 3359232, while the sum is 53.

The spelling of 204231686399 in words is "two hundred four billion, two hundred thirty-one million, six hundred eighty-six thousand, three hundred ninety-nine".