205918885141 has 2 divisors, whose sum is σ = 205918885142. Its totient is φ = 205918885140.

The previous prime is 205918885127. The next prime is 205918885181. The reversal of 205918885141 is 141588819502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155149332100 + 50769553041 = 393890^2 + 225321^2 .

It is a cyclic number.

It is not a de Polignac number, because 205918885141 - 2¹³ = 205918876949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205918885181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102959442570 + 102959442571.

It is an arithmetic number, because the mean of its divisors is an integer number (102959442571).

Almost surely, 2^205918885141 is an apocalyptic number.

It is an amenable number.

205918885141 is a deficient number, since it is larger than the sum of its proper divisors (1).

205918885141 is an equidigital number, since it uses as much as digits as its factorization.

205918885141 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 921600, while the sum is 52.

The spelling of 205918885141 in words is "two hundred five billion, nine hundred eighteen million, eight hundred eighty-five thousand, one hundred forty-one".