73531712768 has 18 divisors (see below), whose sum is σ = 146776192794. Its totient is φ = 36765856256.

The previous prime is 73531712753. The next prime is 73531712789. The reversal of 73531712768 is 86721713537.

It can be written as a sum of positive squares in only one way, i.e., 67126591744 + 6405121024 = 259088^2 + 80032^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143616371 + ... + 143616882.

It is an arithmetic number, because the mean of its divisors is an integer number (8154232933).

Almost surely, 2^73531712768 is an apocalyptic number.

It is an amenable number.

73531712768 is a deficient number, since it is larger than the sum of its proper divisors (73244480026).

73531712768 is an equidigital number, since it uses as much as digits as its factorization.

73531712768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287233269 (or 287233255 counting only the distinct ones).

The product of its digits is 1481760, while the sum is 50.

The spelling of 73531712768 in words is "seventy-three billion, five hundred thirty-one million, seven hundred twelve thousand, seven hundred sixty-eight".