45545545 has 4 divisors (see below), whose sum is σ = 54654660. Its totient is φ = 36436432.

The previous prime is 45545531. The next prime is 45545561. The reversal of 45545545 is 54554554.

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 14776336 + 30769209 = 3844^2 + 5547^2 .

It is a cyclic number.

It is not a de Polignac number, because 45545545 - 2¹⁹ = 45021257 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4554550 + ... + 4554559.

It is an arithmetic number, because the mean of its divisors is an integer number (13663665).

Almost surely, 2^45545545 is an apocalyptic number.

It is an amenable number.

45545545 is a deficient number, since it is larger than the sum of its proper divisors (9109115).

45545545 is an equidigital number, since it uses as much as digits as its factorization.

45545545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9109114.

The product of its digits is 200000, while the sum is 37.

The square root of 45545545 is about 6748.7439572116. The cubic root of 45545545 is about 357.1209276821.

Subtracting 45545545 from its reverse (54554554), we obtain a palindrome (9009009).

The spelling of 45545545 in words is "forty-five million, five hundred forty-five thousand, five hundred forty-five".