44818561 has 4 divisors (see below), whose sum is σ = 44939092. Its totient is φ = 44698032.

The previous prime is 44818547. The next prime is 44818573. The reversal of 44818561 is 16581844.

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 36978561 + 7840000 = 6081^2 + 2800^2 .

It is a cyclic number.

It is not a de Polignac number, because 44818561 - 2⁹ = 44818049 is a prime.

It is a super-2 number, since 2×44818561² = 4017406820221442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 44818561.

It is not an unprimeable number, because it can be changed into a prime (44818061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59706 + ... + 60451.

It is an arithmetic number, because the mean of its divisors is an integer number (11234773).

Almost surely, 2^44818561 is an apocalyptic number.

It is an amenable number.

44818561 is a deficient number, since it is larger than the sum of its proper divisors (120531).

44818561 is a wasteful number, since it uses less digits than its factorization.

44818561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120530.

The product of its digits is 30720, while the sum is 37.

The square root of 44818561 is about 6694.6666085773. Note that the first 4 decimals coincide. The cubic root of 44818561 is about 355.2106426932.

The spelling of 44818561 in words is "forty-four million, eight hundred eighteen thousand, five hundred sixty-one".