11155974523 has 2 divisors, whose sum is σ = 11155974524. Its totient is φ = 11155974522.

The previous prime is 11155974509. The next prime is 11155974539. The reversal of 11155974523 is 32547955111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11155974523 - 2⁵ = 11155974491 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11155974523.

It is not a weakly prime, because it can be changed into another prime (11155074523) by changing a digit.

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 as a sum of consecutive naturals, namely, 5577987261 + 5577987262.

It is an arithmetic number, because the mean of its divisors is an integer number (5577987262).

Almost surely, 2^11155974523 is an apocalyptic number.

11155974523 is a deficient number, since it is larger than the sum of its proper divisors (1).

11155974523 is an equidigital number, since it uses as much as digits as its factorization.

11155974523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 189000, while the sum is 43.

The spelling of 11155974523 in words is "eleven billion, one hundred fifty-five million, nine hundred seventy-four thousand, five hundred twenty-three".