11531533850 has 12 divisors (see below), whose sum is σ = 21448653054. Its totient is φ = 4612613520.

The previous prime is 11531533787. The next prime is 11531533877. The reversal of 11531533850 is 5833513511.

It can be written as a sum of positive squares in 3 ways, for example, as 11066829601 + 464704249 = 105199^2 + 21557^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11531533850.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115315289 + ... + 115315388.

Almost surely, 2^11531533850 is an apocalyptic number.

11531533850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11531533850 is a deficient number, since it is larger than the sum of its proper divisors (9917119204).

11531533850 is a wasteful number, since it uses less digits than its factorization.

11531533850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230630689 (or 230630684 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 11531533850 in words is "eleven billion, five hundred thirty-one million, five hundred thirty-three thousand, eight hundred fifty".