1128643444509 has 8 divisors (see below), whose sum is σ = 1719837629760. Its totient is φ = 644939111136.

The previous prime is 1128643444477. The next prime is 1128643444541. The reversal of 1128643444509 is 9054443468211.

It is an interprime number because it is at equal distance from previous prime (1128643444477) and next prime (1128643444541).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1128643444509 - 2⁵ = 1128643444477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128643443509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26872462944 + ... + 26872462985.

It is an arithmetic number, because the mean of its divisors is an integer number (214979703720).

Almost surely, 2^{1128643444509} is an apocalyptic number.

It is an amenable number.

1128643444509 is a deficient number, since it is larger than the sum of its proper divisors (591194185251).

1128643444509 is an equidigital number, since it uses as much as digits as its factorization.

1128643444509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53744925939.

The product of its (nonzero) digits is 3317760, while the sum is 51.

The spelling of 1128643444509 in words is "one trillion, one hundred twenty-eight billion, six hundred forty-three million, four hundred forty-four thousand, five hundred nine".