1128753318831 has 4 divisors (see below), whose sum is σ = 1505004425112. Its totient is φ = 752502212552.

The previous prime is 1128753318829. The next prime is 1128753318853. The reversal of 1128753318831 is 1388133578211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1128753318831 - 2¹ = 1128753318829 is a prime.

It is a super-2 number, since 2×1128753318831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128753318031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 188125553136 + ... + 188125553141.

It is an arithmetic number, because the mean of its divisors is an integer number (376251106278).

Almost surely, 2^{1128753318831} is an apocalyptic number.

1128753318831 is a deficient number, since it is larger than the sum of its proper divisors (376251106281).

1128753318831 is an equidigital number, since it uses as much as digits as its factorization.

1128753318831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376251106280.

The product of its digits is 967680, while the sum is 51.

The spelling of 1128753318831 in words is "one trillion, one hundred twenty-eight billion, seven hundred fifty-three million, three hundred eighteen thousand, eight hundred thirty-one".