1091544451 has 2 divisors, whose sum is σ = 1091544452. Its totient is φ = 1091544450.

The previous prime is 1091544439. The next prime is 1091544473. The reversal of 1091544451 is 1544451901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091544451 - 2¹⁵ = 1091511683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1091544491) 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, 545772225 + 545772226.

It is an arithmetic number, because the mean of its divisors is an integer number (545772226).

Almost surely, 2^1091544451 is an apocalyptic number.

1091544451 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091544451 is an equidigital number, since it uses as much as digits as its factorization.

1091544451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1091544451 is about 33038.5297947714. The cubic root of 1091544451 is about 1029.6283106038.

The spelling of 1091544451 in words is "one billion, ninety-one million, five hundred forty-four thousand, four hundred fifty-one".