44636561 has 4 divisors (see below), whose sum is σ = 44734692. Its totient is φ = 44538432.

The previous prime is 44636551. The next prime is 44636593. The reversal of 44636561 is 16563644.

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 39137536 + 5499025 = 6256^2 + 2345^2 .

It is a cyclic number.

It is not a de Polignac number, because 44636561 - 2¹⁰ = 44635537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (44636521) 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, 48380 + ... + 49293.

It is an arithmetic number, because the mean of its divisors is an integer number (11183673).

Almost surely, 2^44636561 is an apocalyptic number.

It is an amenable number.

44636561 is a deficient number, since it is larger than the sum of its proper divisors (98131).

44636561 is an equidigital number, since it uses as much as digits as its factorization.

44636561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98130.

The product of its digits is 51840, while the sum is 35.

The square root of 44636561 is about 6681.0598710085. The cubic root of 44636561 is about 354.7291751803.

The spelling of 44636561 in words is "forty-four million, six hundred thirty-six thousand, five hundred sixty-one".