1128865809013 has 4 divisors (see below), whose sum is σ = 1177946931168. Its totient is φ = 1079784686860.

The previous prime is 1128865808977. The next prime is 1128865809037. The reversal of 1128865809013 is 3109085688211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1128865809013 - 2¹⁷ = 1128865677941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128865809053) 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 3 ways as a sum of consecutive naturals, for example, 24540561043 + ... + 24540561088.

It is an arithmetic number, because the mean of its divisors is an integer number (294486732792).

Almost surely, 2^{1128865809013} is an apocalyptic number.

It is an amenable number.

1128865809013 is a deficient number, since it is larger than the sum of its proper divisors (49081122155).

1128865809013 is an equidigital number, since it uses as much as digits as its factorization.

1128865809013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49081122154.

The product of its (nonzero) digits is 829440, while the sum is 52.

The spelling of 1128865809013 in words is "one trillion, one hundred twenty-eight billion, eight hundred sixty-five million, eight hundred nine thousand, thirteen".