204388851137 has 2 divisors, whose sum is σ = 204388851138. Its totient is φ = 204388851136.

The previous prime is 204388851131. The next prime is 204388851371. The reversal of 204388851137 is 731158883402.

Together with next prime (204388851371) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158528200336 + 45860650801 = 398156^2 + 214151^2 .

It is a cyclic number.

It is not a de Polignac number, because 204388851137 - 2⁸ = 204388850881 is a prime.

It is not a weakly prime, because it can be changed into another prime (204388851131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102194425568 + 102194425569.

It is an arithmetic number, because the mean of its divisors is an integer number (102194425569).

Almost surely, 2^204388851137 is an apocalyptic number.

It is an amenable number.

204388851137 is a deficient number, since it is larger than the sum of its proper divisors (1).

204388851137 is an equidigital number, since it uses as much as digits as its factorization.

204388851137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1290240, while the sum is 50.

The spelling of 204388851137 in words is "two hundred four billion, three hundred eighty-eight million, eight hundred fifty-one thousand, one hundred thirty-seven".