1081566623 has 2 divisors, whose sum is σ = 1081566624. Its totient is φ = 1081566622.

The previous prime is 1081566599. The next prime is 1081566637. The reversal of 1081566623 is 3266651801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1081566623 - 2¹⁸ = 1081304479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1081566683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 540783311 + 540783312.

It is an arithmetic number, because the mean of its divisors is an integer number (540783312).

Almost surely, 2^1081566623 is an apocalyptic number.

1081566623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1081566623 is an equidigital number, since it uses as much as digits as its factorization.

1081566623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 1081566623 is about 32887.1802226947. The cubic root of 1081566623 is about 1026.4814186319.

The spelling of 1081566623 in words is "one billion, eighty-one million, five hundred sixty-six thousand, six hundred twenty-three".