1121136640 has 104 divisors (see below), whose sum is σ = 2898041328. Its totient is φ = 413859840.

The previous prime is 1121136589. The next prime is 1121136641. The reversal of 1121136640 is 466311211.

It is a tau number, because it is divible by the number of its divisors (104).

It is not an unprimeable number, because it can be changed into a prime (1121136641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264135 + ... + 268345.

It is an arithmetic number, because the mean of its divisors is an integer number (27865782).

Almost surely, 2^1121136640 is an apocalyptic number.

1121136640 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 1121136640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1449020664).

1121136640 is an abundant number, since it is smaller than the sum of its proper divisors (1776904688).

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

1121136640 is an equidigital number, since it uses as much as digits as its factorization.

1121136640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4253 (or 4231 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1121136640 is about 33483.3785631020. The cubic root of 1121136640 is about 1038.8500109095.

Adding to 1121136640 its reverse (466311211), we get a palindrome (1587447851).

The spelling of 1121136640 in words is "one billion, one hundred twenty-one million, one hundred thirty-six thousand, six hundred forty".