556325565281 has 2 divisors, whose sum is σ = 556325565282. Its totient is φ = 556325565280.

The previous prime is 556325565247. The next prime is 556325565319. The reversal of 556325565281 is 182565523655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 429233315281 + 127092250000 = 655159^2 + 356500^2 .

It is a cyclic number.

It is not a de Polignac number, because 556325565281 - 2¹⁴ = 556325548897 is a prime.

It is a super-2 number, since 2×556325565281² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (556325565221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278162782640 + 278162782641.

It is an arithmetic number, because the mean of its divisors is an integer number (278162782641).

Almost surely, 2^556325565281 is an apocalyptic number.

It is an amenable number.

556325565281 is a deficient number, since it is larger than the sum of its proper divisors (1).

556325565281 is an equidigital number, since it uses as much as digits as its factorization.

556325565281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800000, while the sum is 53.

The spelling of 556325565281 in words is "five hundred fifty-six billion, three hundred twenty-five million, five hundred sixty-five thousand, two hundred eighty-one".