73644513 has 8 divisors (see below), whose sum is σ = 103360800. Its totient is φ = 46512288.

The previous prime is 73644497. The next prime is 73644523. The reversal of 73644513 is 31544637.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 73644513 - 2⁴ = 73644497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73644523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 645948 + ... + 646061.

It is an arithmetic number, because the mean of its divisors is an integer number (12920100).

Almost surely, 2^73644513 is an apocalyptic number.

It is an amenable number.

73644513 is a deficient number, since it is larger than the sum of its proper divisors (29716287).

73644513 is a wasteful number, since it uses less digits than its factorization.

73644513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1292031.

The product of its digits is 30240, while the sum is 33.

The square root of 73644513 is about 8581.6381303339. The cubic root of 73644513 is about 419.1602893964.

The spelling of 73644513 in words is "seventy-three million, six hundred forty-four thousand, five hundred thirteen".