4545454561 has 2 divisors, whose sum is σ = 4545454562. Its totient is φ = 4545454560.

The previous prime is 4545454549. The next prime is 4545454619. The reversal of 4545454561 is 1654545454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2475659536 + 2069795025 = 49756^2 + 45495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4545454561 is a prime.

It is a super-2 number, since 2×4545454561² = 41322314332231405442, which contains 22 as substring.

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

It is not a weakly prime, because it can be changed into another prime (4545454541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2272727280 + 2272727281.

It is an arithmetic number, because the mean of its divisors is an integer number (2272727281).

Almost surely, 2^4545454561 is an apocalyptic number.

It is an amenable number.

4545454561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4545454561 is an equidigital number, since it uses as much as digits as its factorization.

4545454561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960000, while the sum is 43.

The square root of 4545454561 is about 67419.9863616124. The cubic root of 4545454561 is about 1656.5038142482.

The spelling of 4545454561 in words is "four billion, five hundred forty-five million, four hundred fifty-four thousand, five hundred sixty-one".