73561305 has 16 divisors (see below), whose sum is σ = 118742400. Its totient is φ = 38884608.

The previous prime is 73561277. The next prime is 73561307. The reversal of 73561305 is 50316537.

It is not a de Polignac number, because 73561305 - 2⁷ = 73561177 is a prime.

It is a super-2 number, since 2×73561305² = 10822531186606050, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (73561307) 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 15 ways as a sum of consecutive naturals, for example, 20005 + ... + 23394.

It is an arithmetic number, because the mean of its divisors is an integer number (7421400).

Almost surely, 2^73561305 is an apocalyptic number.

It is an amenable number.

73561305 is a deficient number, since it is larger than the sum of its proper divisors (45181095).

73561305 is a wasteful number, since it uses less digits than its factorization.

73561305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43520.

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 73561305 is about 8576.7887347188. The cubic root of 73561305 is about 419.0023657361.

The spelling of 73561305 in words is "seventy-three million, five hundred sixty-one thousand, three hundred five".