45188818 has 4 divisors (see below), whose sum is σ = 67783230. Its totient is φ = 22594408.

The previous prime is 45188797. The next prime is 45188831. The reversal of 45188818 is 81888154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81888154 = 2 ⋅40944077.

It can be written as a sum of positive squares in only one way, i.e., 39652209 + 5536609 = 6297^2 + 2353^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11297203 + ... + 11297206.

Almost surely, 2^45188818 is an apocalyptic number.

45188818 is a deficient number, since it is larger than the sum of its proper divisors (22594412).

45188818 is a wasteful number, since it uses less digits than its factorization.

45188818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22594411.

The product of its digits is 81920, while the sum is 43.

The square root of 45188818 is about 6722.2628630544. The cubic root of 45188818 is about 356.1861217981.

The spelling of 45188818 in words is "forty-five million, one hundred eighty-eight thousand, eight hundred eighteen".