204255314639 has 2 divisors, whose sum is σ = 204255314640. Its totient is φ = 204255314638.

The previous prime is 204255314611. The next prime is 204255314693. The reversal of 204255314639 is 936413552402.

It is a happy number.

Together with next prime (204255314693) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204255314639 - 2⁸ = 204255314383 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 204255314639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204255311639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102127657319 + 102127657320.

It is an arithmetic number, because the mean of its divisors is an integer number (102127657320).

Almost surely, 2^204255314639 is an apocalyptic number.

204255314639 is a deficient number, since it is larger than the sum of its proper divisors (1).

204255314639 is an equidigital number, since it uses as much as digits as its factorization.

204255314639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 44.

The spelling of 204255314639 in words is "two hundred four billion, two hundred fifty-five million, three hundred fourteen thousand, six hundred thirty-nine".