49809565 has 8 divisors (see below), whose sum is σ = 64369368. Its totient is φ = 36782400.

The previous prime is 49809517. The next prime is 49809569. The reversal of 49809565 is 56590894.

It can be written as a sum of positive squares in 4 ways, for example, as 11009124 + 38800441 = 3318^2 + 6229^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 49809565 - 2¹³ = 49801373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (49809569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383086 + ... + 383215.

It is an arithmetic number, because the mean of its divisors is an integer number (8046171).

Almost surely, 2^49809565 is an apocalyptic number.

It is an amenable number.

49809565 is a deficient number, since it is larger than the sum of its proper divisors (14559803).

49809565 is a wasteful number, since it uses less digits than its factorization.

49809565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766319.

The product of its (nonzero) digits is 388800, while the sum is 46.

The square root of 49809565 is about 7057.5891776158. The cubic root of 49809565 is about 367.9348424534.

The spelling of 49809565 in words is "forty-nine million, eight hundred nine thousand, five hundred sixty-five".