1128505911040 has 36 divisors (see below), whose sum is σ = 2703124318104. Its totient is φ = 451402363904.

The previous prime is 1128505911019. The next prime is 1128505911041. The reversal of 1128505911040 is 401195058211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128505911041) 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 in 3 ways as a sum of consecutive naturals, for example, 440821342 + ... + 440823901.

It is an arithmetic number, because the mean of its divisors is an integer number (75086786614).

Almost surely, 2^{1128505911040} is an apocalyptic number.

1128505911040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128505911040 is an abundant number, since it is smaller than the sum of its proper divisors (1574618407064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1128505911040 is an frugal number, since it uses more digits than its factorization.

1128505911040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881645264 (or 881645250 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 37.

The spelling of 1128505911040 in words is "one trillion, one hundred twenty-eight billion, five hundred five million, nine hundred eleven thousand, forty".