1081553569 has 2 divisors, whose sum is σ = 1081553570. Its totient is φ = 1081553568.

The previous prime is 1081553567. The next prime is 1081553591. The reversal of 1081553569 is 9653551801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 798910225 + 282643344 = 28265^2 + 16812^2 .

It is an emirp because it is prime and its reverse (9653551801) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1081553569 - 2¹ = 1081553567 is a prime.

It is a super-2 number, since 2×1081553569² = 2339516245233275522, which contains 22 as substring.

Together with 1081553567, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1081553567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540776784 + 540776785.

It is an arithmetic number, because the mean of its divisors is an integer number (540776785).

Almost surely, 2^1081553569 is an apocalyptic number.

It is an amenable number.

1081553569 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081553569 is an equidigital number, since it uses as much as digits as its factorization.

1081553569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162000, while the sum is 43.

The square root of 1081553569 is about 32886.9817557039. The cubic root of 1081553569 is about 1026.4772888994.

The spelling of 1081553569 in words is "one billion, eighty-one million, five hundred fifty-three thousand, five hundred sixty-nine".