1123581896 has 16 divisors (see below), whose sum is σ = 2111873100. Its totient is φ = 560415744.

The previous prime is 1123581883. The next prime is 1123581911. The reversal of 1123581896 is 6981853211.

It can be written as a sum of positive squares in 2 ways, for example, as 968080996 + 155500900 = 31114^2 + 12470^2 .

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168425 + ... + 174968.

Almost surely, 2^1123581896 is an apocalyptic number.

It is an amenable number.

1123581896 is a deficient number, since it is larger than the sum of its proper divisors (988291204).

1123581896 is a wasteful number, since it uses less digits than its factorization.

1123581896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343808 (or 343804 counting only the distinct ones).

The product of its digits is 103680, while the sum is 44.

The square root of 1123581896 is about 33519.8731501180. The cubic root of 1123581896 is about 1039.6047240457.

The spelling of 1123581896 in words is "one billion, one hundred twenty-three million, five hundred eighty-one thousand, eight hundred ninety-six".