561081206899 has 2 divisors, whose sum is σ = 561081206900. Its totient is φ = 561081206898.

The previous prime is 561081206897. The next prime is 561081206911. The reversal of 561081206899 is 998602180165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561081206899 - 2¹ = 561081206897 is a prime.

Together with 561081206897, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (561081206897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280540603449 + 280540603450.

It is an arithmetic number, because the mean of its divisors is an integer number (280540603450).

Almost surely, 2^561081206899 is an apocalyptic number.

561081206899 is a deficient number, since it is larger than the sum of its proper divisors (1).

561081206899 is an equidigital number, since it uses as much as digits as its factorization.

561081206899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 561081206899 in words is "five hundred sixty-one billion, eighty-one million, two hundred six thousand, eight hundred ninety-nine".