74481818 has 4 divisors (see below), whose sum is σ = 111722730. Its totient is φ = 37240908.

The previous prime is 74481779. The next prime is 74481821. The reversal of 74481818 is 81818447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81818447 = 173 ⋅472939.

It can be written as a sum of positive squares in only one way, i.e., 50794129 + 23687689 = 7127^2 + 4867^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18620453 + ... + 18620456.

Almost surely, 2^74481818 is an apocalyptic number.

74481818 is a deficient number, since it is larger than the sum of its proper divisors (37240912).

74481818 is a wasteful number, since it uses less digits than its factorization.

74481818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37240911.

The product of its digits is 57344, while the sum is 41.

The square root of 74481818 is about 8630.2849315651. The cubic root of 74481818 is about 420.7428614281.

The spelling of 74481818 in words is "seventy-four million, four hundred eighty-one thousand, eight hundred eighteen".