1125203355640 has 256 divisors, whose sum is σ = 3221907333120. Its totient is φ = 344037611520.

The previous prime is 1125203355613. The next prime is 1125203355697. The reversal of 1125203355640 is 465533025211.

It is a self number, because there is not a number n which added to its sum of digits gives 1125203355640.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 69162787 + ... + 69179053.

It is an arithmetic number, because the mean of its divisors is an integer number (12585575520).

Almost surely, 2^{1125203355640} is an apocalyptic number.

1125203355640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125203355640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610953666560).

1125203355640 is an abundant number, since it is smaller than the sum of its proper divisors (2096703977480).

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

1125203355640 is a wasteful number, since it uses less digits than its factorization.

1125203355640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16942 (or 16938 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 1125203355640 in words is "one trillion, one hundred twenty-five billion, two hundred three million, three hundred fifty-five thousand, six hundred forty".