561556363001 has 2 divisors, whose sum is σ = 561556363002. Its totient is φ = 561556363000.

The previous prime is 561556362977. The next prime is 561556363013. The reversal of 561556363001 is 100363655165.

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., 408909091600 + 152647271401 = 639460^2 + 390701^2 .

It is a cyclic number.

It is not a de Polignac number, because 561556363001 - 2¹⁸ = 561556100857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561556363001.

It is not a weakly prime, because it can be changed into another prime (561556363021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280778181500 + 280778181501.

It is an arithmetic number, because the mean of its divisors is an integer number (280778181501).

Almost surely, 2^561556363001 is an apocalyptic number.

It is an amenable number.

561556363001 is a deficient number, since it is larger than the sum of its proper divisors (1).

561556363001 is an equidigital number, since it uses as much as digits as its factorization.

561556363001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 243000, while the sum is 41.

The spelling of 561556363001 in words is "five hundred sixty-one billion, five hundred fifty-six million, three hundred sixty-three thousand, one".