73036533578 has 4 divisors (see below), whose sum is σ = 109554800370. Its totient is φ = 36518266788.

The previous prime is 73036533571. The next prime is 73036533587. The reversal of 73036533578 is 87533563037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87533563037 = 16141 ⋅5423057.

It can be written as a sum of positive squares in only one way, i.e., 42804713449 + 30231820129 = 206893^2 + 173873^2 .

It is not an unprimeable number, because it can be changed into a prime (73036533571) 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, 18259133393 + ... + 18259133396.

Almost surely, 2^73036533578 is an apocalyptic number.

73036533578 is a deficient number, since it is larger than the sum of its proper divisors (36518266792).

73036533578 is a wasteful number, since it uses less digits than its factorization.

73036533578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36518266791.

The product of its (nonzero) digits is 4762800, while the sum is 50.

The spelling of 73036533578 in words is "seventy-three billion, thirty-six million, five hundred thirty-three thousand, five hundred seventy-eight".