73485561 has 4 divisors (see below), whose sum is σ = 97980752. Its totient is φ = 48990372.

The previous prime is 73485557. The next prime is 73485617. The reversal of 73485561 is 16558437.

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.

It is not a de Polignac number, because 73485561 - 2² = 73485557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73481561) 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, 12247591 + ... + 12247596.

It is an arithmetic number, because the mean of its divisors is an integer number (24495188).

Almost surely, 2^73485561 is an apocalyptic number.

It is an amenable number.

73485561 is a deficient number, since it is larger than the sum of its proper divisors (24495191).

73485561 is a wasteful number, since it uses less digits than its factorization.

73485561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24495190.

The product of its digits is 100800, while the sum is 39.

The square root of 73485561 is about 8572.3719587988. The cubic root of 73485561 is about 418.8585047107.

The spelling of 73485561 in words is "seventy-three million, four hundred eighty-five thousand, five hundred sixty-one".