556432561 has 2 divisors, whose sum is σ = 556432562. Its totient is φ = 556432560.

The previous prime is 556432549. The next prime is 556432567. The reversal of 556432561 is 165234655.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472801536 + 83631025 = 21744^2 + 9145^2 .

It is a cyclic number.

It is not a de Polignac number, because 556432561 - 2¹⁵ = 556399793 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 556432561.

It is not a weakly prime, because it can be changed into another prime (556432567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 278216280 + 278216281.

It is an arithmetic number, because the mean of its divisors is an integer number (278216281).

Almost surely, 2^556432561 is an apocalyptic number.

It is an amenable number.

556432561 is a deficient number, since it is larger than the sum of its proper divisors (1).

556432561 is an equidigital number, since it uses as much as digits as its factorization.

556432561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108000, while the sum is 37.

The square root of 556432561 is about 23588.8227980966. The cubic root of 556432561 is about 822.5030403031.

The spelling of 556432561 in words is "five hundred fifty-six million, four hundred thirty-two thousand, five hundred sixty-one".