73775545 has 4 divisors (see below), whose sum is σ = 88530660. Its totient is φ = 59020432.

The previous prime is 73775519. The next prime is 73775549. The reversal of 73775545 is 54557737.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25999801 + 47775744 = 5099^2 + 6912^2 .

It is a cyclic number.

It is not a de Polignac number, because 73775545 - 2⁹ = 73775033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73775549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7377550 + ... + 7377559.

It is an arithmetic number, because the mean of its divisors is an integer number (22132665).

Almost surely, 2^73775545 is an apocalyptic number.

It is an amenable number.

73775545 is a deficient number, since it is larger than the sum of its proper divisors (14755115).

73775545 is a wasteful number, since it uses less digits than its factorization.

73775545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14755114.

The product of its digits is 514500, while the sum is 43.

The square root of 73775545 is about 8589.2691772933. The cubic root of 73775545 is about 419.4087390854.

The spelling of 73775545 in words is "seventy-three million, seven hundred seventy-five thousand, five hundred forty-five".