11557533240 has 96 divisors (see below), whose sum is σ = 40976722800. Its totient is φ = 2801825280.

The previous prime is 11557533227. The next prime is 11557533269. The reversal of 11557533240 is 4233575511.

11557533240 is a `hidden beast` number, since 1 + 15 + 575 + 3 + 32 + 40 = 666.

11557533240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 11557533195 and 11557533204.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 1455325 + ... + 1463244.

Almost surely, 2^11557533240 is an apocalyptic number.

11557533240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11557533240 is an abundant number, since it is smaller than the sum of its proper divisors (29419189560).

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

11557533240 is a wasteful number, since it uses less digits than its factorization.

11557533240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918597 (or 2918590 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 36.

The spelling of 11557533240 in words is "eleven billion, five hundred fifty-seven million, five hundred thirty-three thousand, two hundred forty".