8556207480857 has 2 divisors, whose sum is σ = 8556207480858. Its totient is φ = 8556207480856.

The previous prime is 8556207480781. The next prime is 8556207480871. The reversal of 8556207480857 is 7580847026558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8193356659216 + 362850821641 = 2862404^2 + 602371^2 .

It is a cyclic number.

It is not a de Polignac number, because 8556207480857 - 2³² = 8551912513561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8556207480793 and 8556207480802.

It is not a weakly prime, because it can be changed into another prime (8556207480757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4278103740428 + 4278103740429.

It is an arithmetic number, because the mean of its divisors is an integer number (4278103740429).

Almost surely, 2^{8556207480857} is an apocalyptic number.

It is an amenable number.

8556207480857 is a deficient number, since it is larger than the sum of its proper divisors (1).

8556207480857 is an equidigital number, since it uses as much as digits as its factorization.

8556207480857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150528000, while the sum is 65.

The spelling of 8556207480857 in words is "eight trillion, five hundred fifty-six billion, two hundred seven million, four hundred eighty thousand, eight hundred fifty-seven".