8563557473 has 2 divisors, whose sum is σ = 8563557474. Its totient is φ = 8563557472.

The previous prime is 8563557461. The next prime is 8563557479. The reversal of 8563557473 is 3747553658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7794770944 + 768786529 = 88288^2 + 27727^2 .

It is a cyclic number.

It is not a de Polignac number, because 8563557473 - 2¹² = 8563553377 is a prime.

It is not a weakly prime, because it can be changed into another prime (8563557479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4281778736 + 4281778737.

It is an arithmetic number, because the mean of its divisors is an integer number (4281778737).

Almost surely, 2^8563557473 is an apocalyptic number.

It is an amenable number.

8563557473 is a deficient number, since it is larger than the sum of its proper divisors (1).

8563557473 is an equidigital number, since it uses as much as digits as its factorization.

8563557473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584000, while the sum is 53.

The square root of 8563557473 is about 92539.4914239321. The cubic root of 8563557473 is about 2045.9015855869.

The spelling of 8563557473 in words is "eight billion, five hundred sixty-three million, five hundred fifty-seven thousand, four hundred seventy-three".