561520206214553 has 2 divisors, whose sum is σ = 561520206214554. Its totient is φ = 561520206214552.

The previous prime is 561520206214439. The next prime is 561520206214577. The reversal of 561520206214553 is 355412602025165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380089219999129 + 181430986215424 = 19495877^2 + 13469632^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561520206214553 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561520206214498 and 561520206214507.

It is not a weakly prime, because it can be changed into another prime (561520206210553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280760103107276 + 280760103107277.

It is an arithmetic number, because the mean of its divisors is an integer number (280760103107277).

Almost surely, 2^{561520206214553} is an apocalyptic number.

It is an amenable number.

561520206214553 is a deficient number, since it is larger than the sum of its proper divisors (1).

561520206214553 is an equidigital number, since it uses as much as digits as its factorization.

561520206214553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160000, while the sum is 47.

The spelling of 561520206214553 in words is "five hundred sixty-one trillion, five hundred twenty billion, two hundred six million, two hundred fourteen thousand, five hundred fifty-three".