205600551461 has 2 divisors, whose sum is σ = 205600551462. Its totient is φ = 205600551460.

The previous prime is 205600551433. The next prime is 205600551473. The reversal of 205600551461 is 164155006502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128222002561 + 77378548900 = 358081^2 + 278170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205600551461 is a prime.

It is a super-2 number, since 2×205600551461² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205600551421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102800275730 + 102800275731.

It is an arithmetic number, because the mean of its divisors is an integer number (102800275731).

Almost surely, 2^205600551461 is an apocalyptic number.

It is an amenable number.

205600551461 is a deficient number, since it is larger than the sum of its proper divisors (1).

205600551461 is an equidigital number, since it uses as much as digits as its factorization.

205600551461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 205600551461 its reverse (164155006502), we get a palindrome (369755557963).

The spelling of 205600551461 in words is "two hundred five billion, six hundred million, five hundred fifty-one thousand, four hundred sixty-one".