54545545 has 4 divisors (see below), whose sum is σ = 65454660. Its totient is φ = 43636432.

The previous prime is 54545501. The next prime is 54545573. The reversal of 54545545 is 54554545.

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 15657849 + 38887696 = 3957^2 + 6236^2 .

It is a cyclic number.

It is not a de Polignac number, because 54545545 - 2⁹ = 54545033 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, 5454550 + ... + 5454559.

It is an arithmetic number, because the mean of its divisors is an integer number (16363665).

Almost surely, 2^54545545 is an apocalyptic number.

It is an amenable number.

54545545 is a deficient number, since it is larger than the sum of its proper divisors (10909115).

54545545 is a wasteful number, since it uses less digits than its factorization.

54545545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10909114.

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

The square root of 54545545 is about 7385.4955825591. The cubic root of 54545545 is about 379.2449110084.

The spelling of 54545545 in words is "fifty-four million, five hundred forty-five thousand, five hundred forty-five".