561671246077 has 2 divisors, whose sum is σ = 561671246078. Its totient is φ = 561671246076.

The previous prime is 561671246069. The next prime is 561671246119. The reversal of 561671246077 is 770642176165.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338973141796 + 222698104281 = 582214^2 + 471909^2 .

It is a cyclic number.

It is not a de Polignac number, because 561671246077 - 2³ = 561671246069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561671256077) 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, 280835623038 + 280835623039.

It is an arithmetic number, because the mean of its divisors is an integer number (280835623039).

Almost surely, 2^561671246077 is an apocalyptic number.

It is an amenable number.

561671246077 is a deficient number, since it is larger than the sum of its proper divisors (1).

561671246077 is an equidigital number, since it uses as much as digits as its factorization.

561671246077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2963520, while the sum is 52.

The spelling of 561671246077 in words is "five hundred sixty-one billion, six hundred seventy-one million, two hundred forty-six thousand, seventy-seven".