561886651 has 2 divisors, whose sum is σ = 561886652. Its totient is φ = 561886650.

The previous prime is 561886643. The next prime is 561886679. The reversal of 561886651 is 156688165.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 561886651 - 2³ = 561886643 is a prime.

It is not a weakly prime, because it can be changed into another prime (561896651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280943325 + 280943326.

It is an arithmetic number, because the mean of its divisors is an integer number (280943326).

Almost surely, 2^561886651 is an apocalyptic number.

561886651 is a deficient number, since it is larger than the sum of its proper divisors (1).

561886651 is an equidigital number, since it uses as much as digits as its factorization.

561886651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 345600, while the sum is 46.

The square root of 561886651 is about 23704.1483922119. The cubic root of 561886651 is about 825.1816684716.

The spelling of 561886651 in words is "five hundred sixty-one million, eight hundred eighty-six thousand, six hundred fifty-one".