73145564 has 6 divisors (see below), whose sum is σ = 128004744. Its totient is φ = 36572780.

The previous prime is 73145563. The next prime is 73145581. The reversal of 73145564 is 46554137.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73145563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9143192 + ... + 9143199.

It is an arithmetic number, because the mean of its divisors is an integer number (21334124).

Almost surely, 2^73145564 is an apocalyptic number.

It is an amenable number.

73145564 is a deficient number, since it is larger than the sum of its proper divisors (54859180).

73145564 is a wasteful number, since it uses less digits than its factorization.

73145564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18286395 (or 18286393 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 73145564 is about 8552.5179917963. The cubic root of 73145564 is about 418.2115257637.

The spelling of 73145564 in words is "seventy-three million, one hundred forty-five thousand, five hundred sixty-four".