73381618 has 4 divisors (see below), whose sum is σ = 110072430. Its totient is φ = 36690808.

The previous prime is 73381603. The next prime is 73381669. The reversal of 73381618 is 81618337.

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., 43864129 + 29517489 = 6623^2 + 5433^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18345403 + ... + 18345406.

Almost surely, 2^73381618 is an apocalyptic number.

73381618 is a deficient number, since it is larger than the sum of its proper divisors (36690812).

73381618 is a wasteful number, since it uses less digits than its factorization.

73381618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36690811.

The product of its digits is 24192, while the sum is 37.

The square root of 73381618 is about 8566.3071390185. The cubic root of 73381618 is about 418.6609241586.

The spelling of 73381618 in words is "seventy-three million, three hundred eighty-one thousand, six hundred eighteen".