73326561 has 16 divisors (see below), whose sum is σ = 121893888. Its totient is φ = 38091600.

The previous prime is 73326551. The next prime is 73326571. The reversal of 73326561 is 16562337.

It is an interprime number because it is at equal distance from previous prime (73326551) and next prime (73326571).

It is not a de Polignac number, because 73326561 - 2⁶ = 73326497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (73326541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158485 + ... + 158946.

It is an arithmetic number, because the mean of its divisors is an integer number (7618368).

Almost surely, 2^73326561 is an apocalyptic number.

It is an amenable number.

73326561 is a deficient number, since it is larger than the sum of its proper divisors (48567327).

73326561 is a wasteful number, since it uses less digits than its factorization.

73326561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317452.

The product of its digits is 22680, while the sum is 33.

The square root of 73326561 is about 8563.0929575709. The cubic root of 73326561 is about 418.5561931998.

Adding to 73326561 its reverse (16562337), we get a palindrome (89888898).

The spelling of 73326561 in words is "seventy-three million, three hundred twenty-six thousand, five hundred sixty-one".