1128395556920 has 64 divisors (see below), whose sum is σ = 2551831793280. Its totient is φ = 449062862976.

The previous prime is 1128395556919. The next prime is 1128395556923. The reversal of 1128395556920 is 296555938211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128395556923) 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 15 ways as a sum of consecutive naturals, for example, 6633167 + ... + 6801153.

It is an arithmetic number, because the mean of its divisors is an integer number (39872371770).

Almost surely, 2^{1128395556920} is an apocalyptic number.

1128395556920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1128395556920 is an abundant number, since it is smaller than the sum of its proper divisors (1423436236360).

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

1128395556920 is a wasteful number, since it uses less digits than its factorization.

1128395556920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168852 (or 168848 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 56.

The spelling of 1128395556920 in words is "one trillion, one hundred twenty-eight billion, three hundred ninety-five million, five hundred fifty-six thousand, nine hundred twenty".