45173818 has 8 divisors (see below), whose sum is σ = 69592212. Its totient is φ = 21976416.

The previous prime is 45173813. The next prime is 45173831. The reversal of 45173818 is 81837154.

It can be written as a sum of positive squares in 2 ways, for example, as 34656769 + 10517049 = 5887^2 + 3243^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (45173813) 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, 305155 + ... + 305302.

Almost surely, 2^45173818 is an apocalyptic number.

45173818 is a deficient number, since it is larger than the sum of its proper divisors (24418394).

45173818 is a wasteful number, since it uses less digits than its factorization.

45173818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610496.

The product of its digits is 26880, while the sum is 37.

The square root of 45173818 is about 6721.1470747187. The cubic root of 45173818 is about 356.1467065671.

The spelling of 45173818 in words is "forty-five million, one hundred seventy-three thousand, eight hundred eighteen".