73643216 has 20 divisors (see below), whose sum is σ = 146165124. Its totient is φ = 35923200.

The previous prime is 73643179. The next prime is 73643233. The reversal of 73643216 is 61234637.

It can be written as a sum of positive squares in 2 ways, for example, as 43612816 + 30030400 = 6604^2 + 5480^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55475 + ... + 56786.

Almost surely, 2^73643216 is an apocalyptic number.

It is an amenable number.

73643216 is a deficient number, since it is larger than the sum of its proper divisors (72521908).

73643216 is a wasteful number, since it uses less digits than its factorization.

73643216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112310 (or 112304 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 73643216 is about 8581.5625616784. The cubic root of 73643216 is about 419.1578286832.

The spelling of 73643216 in words is "seventy-three million, six hundred forty-three thousand, two hundred sixteen".