44561809 has 4 divisors (see below), whose sum is σ = 44593380. Its totient is φ = 44530240.

The previous prime is 44561791. The next prime is 44561819. The reversal of 44561809 is 90816544.

It is a happy number.

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 20502784 + 24059025 = 4528^2 + 4905^2 .

It is a cyclic number.

It is not a de Polignac number, because 44561809 - 2¹⁵ = 44529041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44561819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13564 + ... + 16525.

It is an arithmetic number, because the mean of its divisors is an integer number (11148345).

Almost surely, 2^44561809 is an apocalyptic number.

It is an amenable number.

44561809 is a deficient number, since it is larger than the sum of its proper divisors (31571).

44561809 is a wasteful number, since it uses less digits than its factorization.

44561809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31570.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 44561809 is about 6675.4632049020. The cubic root of 44561809 is about 354.5310451359.

The spelling of 44561809 in words is "forty-four million, five hundred sixty-one thousand, eight hundred nine".