205851234037 has 2 divisors, whose sum is σ = 205851234038. Its totient is φ = 205851234036.

The previous prime is 205851234013. The next prime is 205851234041. The reversal of 205851234037 is 730432158502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205849134436 + 2099601 = 453706^2 + 1449^2 .

It is a cyclic number.

It is not a de Polignac number, because 205851234037 - 2¹⁹ = 205850709749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205851234047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102925617018 + 102925617019.

It is an arithmetic number, because the mean of its divisors is an integer number (102925617019).

Almost surely, 2^205851234037 is an apocalyptic number.

It is an amenable number.

205851234037 is a deficient number, since it is larger than the sum of its proper divisors (1).

205851234037 is an equidigital number, since it uses as much as digits as its factorization.

205851234037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 40.

The spelling of 205851234037 in words is "two hundred five billion, eight hundred fifty-one million, two hundred thirty-four thousand, thirty-seven".