73418161 has 4 divisors (see below), whose sum is σ = 73437300. Its totient is φ = 73399024.

The previous prime is 73418153. The next prime is 73418179. The reversal of 73418161 is 16181437.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3779136 + 69639025 = 1944^2 + 8345^2 .

It is a cyclic number.

It is not a de Polignac number, because 73418161 - 2³ = 73418153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73412161) 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, 1606 + ... + 12223.

It is an arithmetic number, because the mean of its divisors is an integer number (18359325).

Almost surely, 2^73418161 is an apocalyptic number.

It is an amenable number.

73418161 is a deficient number, since it is larger than the sum of its proper divisors (19139).

73418161 is a wasteful number, since it uses less digits than its factorization.

73418161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19138.

The product of its digits is 4032, while the sum is 31.

The square root of 73418161 is about 8568.4398229783. The cubic root of 73418161 is about 418.7304083505.

Adding to 73418161 its reverse (16181437), we get a palindrome (89599598).

The spelling of 73418161 in words is "seventy-three million, four hundred eighteen thousand, one hundred sixty-one".