73558330561 has 4 divisors (see below), whose sum is σ = 75123401472. Its totient is φ = 71993259652.

The previous prime is 73558330529. The next prime is 73558330609. The reversal of 73558330561 is 16503385537.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16503385537 = 457 ⋅36112441.

It is a cyclic number.

It is not a de Polignac number, because 73558330561 - 2⁵ = 73558330529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73558330361) 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, 782535385 + ... + 782535478.

It is an arithmetic number, because the mean of its divisors is an integer number (18780850368).

Almost surely, 2^73558330561 is an apocalyptic number.

It is an amenable number.

73558330561 is a deficient number, since it is larger than the sum of its proper divisors (1565070911).

73558330561 is a wasteful number, since it uses less digits than its factorization.

73558330561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1565070910.

The product of its (nonzero) digits is 1134000, while the sum is 46.

The spelling of 73558330561 in words is "seventy-three billion, five hundred fifty-eight million, three hundred thirty thousand, five hundred sixty-one".