73509219006728 has 36 divisors (see below), whose sum is σ = 145466696624445. Its totient is φ = 34819938119520.

The previous prime is 73509219006703. The next prime is 73509219006731. The reversal of 73509219006728 is 82760091290537.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 2 ways, for example, as 71211623935204 + 2297595071524 = 8438698^2 + 1515782^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=6062558.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 460674638 + ... + 460834178.

Almost surely, 2^{73509219006728} is an apocalyptic number.

It is an amenable number.

73509219006728 is a deficient number, since it is larger than the sum of its proper divisors (71957477617717).

73509219006728 is an frugal number, since it uses more digits than its factorization.

73509219006728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319126 (or 159562 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 59.

The spelling of 73509219006728 in words is "seventy-three trillion, five hundred nine billion, two hundred nineteen million, six thousand, seven hundred twenty-eight".