74545809 has 16 divisors (see below), whose sum is σ = 107295552. Its totient is φ = 45764928.

The previous prime is 74545781. The next prime is 74545817. The reversal of 74545809 is 90854547.

It is not a de Polignac number, because 74545809 - 2¹¹ = 74543761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74545819) 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, 16167 + ... + 20259.

It is an arithmetic number, because the mean of its divisors is an integer number (6705972).

Almost surely, 2^74545809 is an apocalyptic number.

It is an amenable number.

74545809 is a deficient number, since it is larger than the sum of its proper divisors (32749743).

74545809 is a wasteful number, since it uses less digits than its factorization.

74545809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4576.

The product of its (nonzero) digits is 201600, while the sum is 42.

The square root of 74545809 is about 8633.9914871397. The cubic root of 74545809 is about 420.8633205788.

The spelling of 74545809 in words is "seventy-four million, five hundred forty-five thousand, eight hundred nine".