1158135822 has 48 divisors (see below), whose sum is σ = 2609100000. Its totient is φ = 370827072.

The previous prime is 1158135809. The next prime is 1158135827. The reversal of 1158135822 is 2285318511.

1158135822 is a `hidden beast` number, since 1 + 1 + 581 + 3 + 58 + 22 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158135827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98304 + ... + 109452.

It is an arithmetic number, because the mean of its divisors is an integer number (54356250).

Almost surely, 2^1158135822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1158135822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304550000).

1158135822 is an abundant number, since it is smaller than the sum of its proper divisors (1450964178).

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

1158135822 is a wasteful number, since it uses less digits than its factorization.

1158135822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11385 (or 11382 counting only the distinct ones).

The product of its digits is 19200, while the sum is 36.

The square root of 1158135822 is about 34031.3946525851. The cubic root of 1158135822 is about 1050.1544208260.

The spelling of 1158135822 in words is "one billion, one hundred fifty-eight million, one hundred thirty-five thousand, eight hundred twenty-two".