1055566056553 has 2 divisors, whose sum is σ = 1055566056554. Its totient is φ = 1055566056552.

The previous prime is 1055566056529. The next prime is 1055566056607. The reversal of 1055566056553 is 3556506655501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 555422901289 + 500143155264 = 745267^2 + 707208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1055566056553 is a prime.

It is a super-2 number, since 2×1055566056553² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1055566056553.

It is not a weakly prime, because it can be changed into another prime (1055566066553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 527783028276 + 527783028277.

It is an arithmetic number, because the mean of its divisors is an integer number (527783028277).

Almost surely, 2^{1055566056553} is an apocalyptic number.

It is an amenable number.

1055566056553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1055566056553 is an equidigital number, since it uses as much as digits as its factorization.

1055566056553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10125000, while the sum is 52.

The spelling of 1055566056553 in words is "one trillion, fifty-five billion, five hundred sixty-six million, fifty-six thousand, five hundred fifty-three".