205550000377 has 2 divisors, whose sum is σ = 205550000378. Its totient is φ = 205550000376.

The previous prime is 205550000321. The next prime is 205550000389. The reversal of 205550000377 is 773000055502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142071701776 + 63478298601 = 376924^2 + 251949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205550000377 is a prime.

It is not a weakly prime, because it can be changed into another prime (205550000977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102775000188 + 102775000189.

It is an arithmetic number, because the mean of its divisors is an integer number (102775000189).

Almost surely, 2^205550000377 is an apocalyptic number.

It is an amenable number.

205550000377 is a deficient number, since it is larger than the sum of its proper divisors (1).

205550000377 is an equidigital number, since it uses as much as digits as its factorization.

205550000377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36750, while the sum is 34.

Adding to 205550000377 its reverse (773000055502), we get a palindrome (978550055879).

The spelling of 205550000377 in words is "two hundred five billion, five hundred fifty million, three hundred seventy-seven", and thus it is an aban number.