556516361 has 2 divisors, whose sum is σ = 556516362. Its totient is φ = 556516360.

The previous prime is 556516357. The next prime is 556516381. The reversal of 556516361 is 163615655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426670336 + 129846025 = 20656^2 + 11395^2 .

It is a cyclic number.

It is not a de Polignac number, because 556516361 - 2² = 556516357 is a prime.

It is not a weakly prime, because it can be changed into another prime (556516381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278258180 + 278258181.

It is an arithmetic number, because the mean of its divisors is an integer number (278258181).

Almost surely, 2^556516361 is an apocalyptic number.

It is an amenable number.

556516361 is a deficient number, since it is larger than the sum of its proper divisors (1).

556516361 is an equidigital number, since it uses as much as digits as its factorization.

556516361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 38.

The square root of 556516361 is about 23590.5989962103. The cubic root of 556516361 is about 822.5443285021.

It can be divided in two parts, 556516 and 361, that multiplied together give a square (200902276 = 14174²).

The spelling of 556516361 in words is "five hundred fifty-six million, five hundred sixteen thousand, three hundred sixty-one".