561578077553 has 2 divisors, whose sum is σ = 561578077554. Its totient is φ = 561578077552.

The previous prime is 561578077507. The next prime is 561578077561. The reversal of 561578077553 is 355770875165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 471567877264 + 90010200289 = 686708^2 + 300017^2 .

It is a cyclic number.

It is not a de Polignac number, because 561578077553 - 2⁸ = 561578077297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561578077492 and 561578077501.

It is not a weakly prime, because it can be changed into another prime (561578077253) 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, 280789038776 + 280789038777.

It is an arithmetic number, because the mean of its divisors is an integer number (280789038777).

Almost surely, 2^561578077553 is an apocalyptic number.

It is an amenable number.

561578077553 is a deficient number, since it is larger than the sum of its proper divisors (1).

561578077553 is an equidigital number, since it uses as much as digits as its factorization.

561578077553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30870000, while the sum is 59.

The spelling of 561578077553 in words is "five hundred sixty-one billion, five hundred seventy-eight million, seventy-seven thousand, five hundred fifty-three".