545454545 has 12 divisors (see below), whose sum is σ = 684244596. Its totient is φ = 417389280.

The previous prime is 545454521. The next prime is 545454563.

545454545 is nontrivially palindromic in base 10.

545454545 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.

It can be written as a sum of positive squares in 2 ways, for example, as 372374209 + 173080336 = 19297^2 + 13156^2 .

It is not a de Polignac number, because 545454545 - 2⁸ = 545454289 is a prime.

It is a super-2 number, since 2×545454545² = 595041321322314050, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

545454545 is an undulating number in base 10.

545454545 is a modest number, since divided by 454545 gives 545 as remainder.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 100466 + ... + 105755.

It is an arithmetic number, because the mean of its divisors is an integer number (57020383).

Almost surely, 2^545454545 is an apocalyptic number.

It is an amenable number.

545454545 is a deficient number, since it is larger than the sum of its proper divisors (138790051).

545454545 is a wasteful number, since it uses less digits than its factorization.

545454545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206272 (or 206249 counting only the distinct ones).

The product of its digits is 800000, while the sum is 41.

The square root of 545454545 is about 23354.9683151145. The cubic root of 545454545 is about 817.0579404163.

The spelling of 545454545 in words is "five hundred forty-five million, four hundred fifty-four thousand, five hundred forty-five".