11173143541 has 4 divisors (see below), whose sum is σ = 12769306912. Its totient is φ = 9576980172.

The previous prime is 11173143539. The next prime is 11173143547. The reversal of 11173143541 is 14534137111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11173143541 - 2¹ = 11173143539 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11173143547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798081675 + ... + 798081688.

It is an arithmetic number, because the mean of its divisors is an integer number (3192326728).

Almost surely, 2^11173143541 is an apocalyptic number.

It is an amenable number.

11173143541 is a deficient number, since it is larger than the sum of its proper divisors (1596163371).

11173143541 is an equidigital number, since it uses as much as digits as its factorization.

11173143541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1596163370.

The product of its digits is 5040, while the sum is 31.

The spelling of 11173143541 in words is "eleven billion, one hundred seventy-three million, one hundred forty-three thousand, five hundred forty-one".