1121536836 has 216 divisors, whose sum is σ = 3472822080. Its totient is φ = 298553472.

The previous prime is 1121536813. The next prime is 1121536847. The reversal of 1121536836 is 6386351211.

1121536836 is a `hidden beast` number, since 112 + 1 + 536 + 8 + 3 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1121536836.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 13512451 + ... + 13512533.

It is an arithmetic number, because the mean of its divisors is an integer number (16077880).

Almost surely, 2^1121536836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121536836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1736411040).

1121536836 is an abundant number, since it is smaller than the sum of its proper divisors (2351285244).

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

1121536836 is a wasteful number, since it uses less digits than its factorization.

1121536836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 167 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 1121536836 is about 33489.3540696144. The cubic root of 1121536836 is about 1038.9736039806.

The spelling of 1121536836 in words is "one billion, one hundred twenty-one million, five hundred thirty-six thousand, eight hundred thirty-six".