73033270561 has 4 divisors (see below), whose sum is σ = 74411256852. Its totient is φ = 71655284272.

The previous prime is 73033270511. The next prime is 73033270571. The reversal of 73033270561 is 16507233037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16507233037 = 587 ⋅28121351.

It can be written as a sum of positive squares in 2 ways, for example, as 40791476961 + 32241793600 = 201969^2 + 179560^2 .

It is a cyclic number.

It is not a de Polignac number, because 73033270561 - 2⁹ = 73033270049 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 73033270561.

It is not an unprimeable number, because it can be changed into a prime (73033270511) 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 in 3 ways as a sum of consecutive naturals, for example, 688993066 + ... + 688993171.

It is an arithmetic number, because the mean of its divisors is an integer number (18602814213).

Almost surely, 2^73033270561 is an apocalyptic number.

It is an amenable number.

73033270561 is a deficient number, since it is larger than the sum of its proper divisors (1377986291).

73033270561 is a wasteful number, since it uses less digits than its factorization.

73033270561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1377986290.

The product of its (nonzero) digits is 79380, while the sum is 37.

The spelling of 73033270561 in words is "seventy-three billion, thirty-three million, two hundred seventy thousand, five hundred sixty-one".