204131012639 has 2 divisors, whose sum is σ = 204131012640. Its totient is φ = 204131012638.

The previous prime is 204131012621. The next prime is 204131012647. The reversal of 204131012639 is 936210131402.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 204131012639 - 2¹⁶ = 204130947103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204131012539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102065506319 + 102065506320.

It is an arithmetic number, because the mean of its divisors is an integer number (102065506320).

Almost surely, 2^204131012639 is an apocalyptic number.

204131012639 is a deficient number, since it is larger than the sum of its proper divisors (1).

204131012639 is an equidigital number, since it uses as much as digits as its factorization.

204131012639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The spelling of 204131012639 in words is "two hundred four billion, one hundred thirty-one million, twelve thousand, six hundred thirty-nine".