11506554236533 has 2 divisors, whose sum is σ = 11506554236534. Its totient is φ = 11506554236532.

The previous prime is 11506554236521. The next prime is 11506554236563. The reversal of 11506554236533 is 33563245560511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5785646083569 + 5720908152964 = 2405337^2 + 2391842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11506554236533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11506554236563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5753277118266 + 5753277118267.

It is an arithmetic number, because the mean of its divisors is an integer number (5753277118267).

Almost surely, 2^{11506554236533} is an apocalyptic number.

It is an amenable number.

11506554236533 is a deficient number, since it is larger than the sum of its proper divisors (1).

11506554236533 is an equidigital number, since it uses as much as digits as its factorization.

11506554236533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860000, while the sum is 49.

The spelling of 11506554236533 in words is "eleven trillion, five hundred six billion, five hundred fifty-four million, two hundred thirty-six thousand, five hundred thirty-three".