556535416612261 has 2 divisors, whose sum is σ = 556535416612262. Its totient is φ = 556535416612260.

The previous prime is 556535416612211. The next prime is 556535416612271. The reversal of 556535416612261 is 162216614535655.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296010992700900 + 260524423911361 = 17204970^2 + 16140769^2 .

It is a cyclic number.

It is not a de Polignac number, because 556535416612261 - 2⁹ = 556535416611749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 556535416612196 and 556535416612205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556535416612211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278267708306130 + 278267708306131.

It is an arithmetic number, because the mean of its divisors is an integer number (278267708306131).

Almost surely, 2^{556535416612261} is an apocalyptic number.

It is an amenable number.

556535416612261 is a deficient number, since it is larger than the sum of its proper divisors (1).

556535416612261 is an equidigital number, since it uses as much as digits as its factorization.

556535416612261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880000, while the sum is 58.

The spelling of 556535416612261 in words is "five hundred fifty-six trillion, five hundred thirty-five billion, four hundred sixteen million, six hundred twelve thousand, two hundred sixty-one".