49564561 has 4 divisors (see below), whose sum is σ = 49589172. Its totient is φ = 49539952.

The previous prime is 49564553. The next prime is 49564579. The reversal of 49564561 is 16546594.

It is a happy number.

49564561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 48650625 + 913936 = 6975^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 49564561 - 2³ = 49564553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (49564511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8986 + ... + 13411.

It is an arithmetic number, because the mean of its divisors is an integer number (12397293).

Almost surely, 2^49564561 is an apocalyptic number.

It is an amenable number.

49564561 is a deficient number, since it is larger than the sum of its proper divisors (24611).

49564561 is a wasteful number, since it uses less digits than its factorization.

49564561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24610.

The product of its digits is 129600, while the sum is 40.

The square root of 49564561 is about 7040.2102951545. The cubic root of 49564561 is about 367.3305829009.

Subtracting from 49564561 its product of digits (129600), we obtain a square (49434961 = 7031²).

It can be divided in two parts, 495 and 64561, that added together give a palindrome (65056).

The spelling of 49564561 in words is "forty-nine million, five hundred sixty-four thousand, five hundred sixty-one".