45455545 has 4 divisors (see below), whose sum is σ = 54546660. Its totient is φ = 36364432.

The previous prime is 45455539. The next prime is 45455551. The reversal of 45455545 is 54555454.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54555454 = 2 ⋅27277727.

It is an interprime number because it is at equal distance from previous prime (45455539) and next prime (45455551).

It can be written as a sum of positive squares in 2 ways, for example, as 10916416 + 34539129 = 3304^2 + 5877^2 .

It is a cyclic number.

It is not a de Polignac number, because 45455545 - 2³ = 45455537 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, 4545550 + ... + 4545559.

It is an arithmetic number, because the mean of its divisors is an integer number (13636665).

Almost surely, 2^45455545 is an apocalyptic number.

It is an amenable number.

45455545 is a deficient number, since it is larger than the sum of its proper divisors (9091115).

45455545 is an equidigital number, since it uses as much as digits as its factorization.

45455545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091114.

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

The square root of 45455545 is about 6742.0727524998. The cubic root of 45455545 is about 356.8855436845.

Subtracting 45455545 from its reverse (54555454), we obtain a palindrome (9099909).

The spelling of 45455545 in words is "forty-five million, four hundred fifty-five thousand, five hundred forty-five".