11173818745 has 4 divisors (see below), whose sum is σ = 13408582500. Its totient is φ = 8939054992.

The previous prime is 11173818739. The next prime is 11173818751. The reversal of 11173818745 is 54781837111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11173818739) and next prime (11173818751).

It can be written as a sum of positive squares in 2 ways, for example, as 1513287801 + 9660530944 = 38901^2 + 98288^2 .

It is a cyclic number.

It is not a de Polignac number, because 11173818745 - 2¹³ = 11173810553 is a prime.

It is a super-2 number, since 2×11173818745² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11173818695 and 11173818704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1117381870 + ... + 1117381879.

It is an arithmetic number, because the mean of its divisors is an integer number (3352145625).

Almost surely, 2^11173818745 is an apocalyptic number.

It is an amenable number.

11173818745 is a deficient number, since it is larger than the sum of its proper divisors (2234763755).

11173818745 is an equidigital number, since it uses as much as digits as its factorization.

11173818745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234763754.

The product of its digits is 188160, while the sum is 46.

The spelling of 11173818745 in words is "eleven billion, one hundred seventy-three million, eight hundred eighteen thousand, seven hundred forty-five".