45191018 has 4 divisors (see below), whose sum is σ = 67786530. Its totient is φ = 22595508.

The previous prime is 45191011. The next prime is 45191053. The reversal of 45191018 is 81019154.

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

It can be written as a sum of positive squares in only one way, i.e., 44662489 + 528529 = 6683^2 + 727^2 .

It is not an unprimeable number, because it can be changed into a prime (45191011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11297753 + ... + 11297756.

Almost surely, 2^45191018 is an apocalyptic number.

45191018 is a deficient number, since it is larger than the sum of its proper divisors (22595512).

45191018 is a wasteful number, since it uses less digits than its factorization.

45191018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22595511.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 45191018 is about 6722.4264964371. The cubic root of 45191018 is about 356.1919019652.

The spelling of 45191018 in words is "forty-five million, one hundred ninety-one thousand, eighteen".