556263571261 has 2 divisors, whose sum is σ = 556263571262. Its totient is φ = 556263571260.

The previous prime is 556263571229. The next prime is 556263571271. The reversal of 556263571261 is 162175362655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 322829648761 + 233433922500 = 568181^2 + 483150^2 .

It is a cyclic number.

It is not a de Polignac number, because 556263571261 - 2⁵ = 556263571229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (556263571271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278131785630 + 278131785631.

It is an arithmetic number, because the mean of its divisors is an integer number (278131785631).

Almost surely, 2^556263571261 is an apocalyptic number.

It is an amenable number.

556263571261 is a deficient number, since it is larger than the sum of its proper divisors (1).

556263571261 is an equidigital number, since it uses as much as digits as its factorization.

556263571261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 49.

The spelling of 556263571261 in words is "five hundred fifty-six billion, two hundred sixty-three million, five hundred seventy-one thousand, two hundred sixty-one".