11531120533564 has 24 divisors (see below), whose sum is σ = 20250945410528. Its totient is φ = 5745171317760.

The previous prime is 11531120533477. The next prime is 11531120533573. The reversal of 11531120533564 is 46533502113511.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3086817 + ... + 5708824.

Almost surely, 2^{11531120533564} is an apocalyptic number.

It is an amenable number.

11531120533564 is a deficient number, since it is larger than the sum of its proper divisors (8719824876964).

11531120533564 is a wasteful number, since it uses less digits than its factorization.

11531120533564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796805 (or 8796803 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 11531120533564 in words is "eleven trillion, five hundred thirty-one billion, one hundred twenty million, five hundred thirty-three thousand, five hundred sixty-four".