205385000851 has 2 divisors, whose sum is σ = 205385000852. Its totient is φ = 205385000850.

The previous prime is 205385000813. The next prime is 205385000893. The reversal of 205385000851 is 158000583502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 205385000851 - 2²¹ = 205382903699 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 205385000851.

It is not a weakly prime, because it can be changed into another prime (205385000801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102692500425 + 102692500426.

It is an arithmetic number, because the mean of its divisors is an integer number (102692500426).

Almost surely, 2^205385000851 is an apocalyptic number.

205385000851 is a deficient number, since it is larger than the sum of its proper divisors (1).

205385000851 is an equidigital number, since it uses as much as digits as its factorization.

205385000851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 205385000851 in words is "two hundred five billion, three hundred eighty-five million, eight hundred fifty-one", and thus it is an aban number.