11523456173 has 2 divisors, whose sum is σ = 11523456174. Its totient is φ = 11523456172.

The previous prime is 11523456169. The next prime is 11523456223. The reversal of 11523456173 is 37165432511.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11270582569 + 252873604 = 106163^2 + 15902^2 .

It is a cyclic number.

It is not a de Polignac number, because 11523456173 - 2² = 11523456169 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11523456473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5761728086 + 5761728087.

It is an arithmetic number, because the mean of its divisors is an integer number (5761728087).

Almost surely, 2^11523456173 is an apocalyptic number.

It is an amenable number.

11523456173 is a deficient number, since it is larger than the sum of its proper divisors (1).

11523456173 is an equidigital number, since it uses as much as digits as its factorization.

11523456173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

Adding to 11523456173 its reverse (37165432511), we get a palindrome (48688888684).

The spelling of 11523456173 in words is "eleven billion, five hundred twenty-three million, four hundred fifty-six thousand, one hundred seventy-three".