50555616565 has 8 divisors (see below), whose sum is σ = 60670552248. Its totient is φ = 40441951680.

The previous prime is 50555616523. The next prime is 50555616569. The reversal of 50555616565 is 56561655505.

It can be written as a sum of positive squares in 4 ways, for example, as 1614673489 + 48940943076 = 40183^2 + 221226^2 .

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

It is not a de Polignac number, because 50555616565 - 2¹⁷ = 50555485493 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 (50555616569) 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, 227866 + ... + 391195.

It is an arithmetic number, because the mean of its divisors is an integer number (7583819031).

Almost surely, 2^50555616565 is an apocalyptic number.

It is an amenable number.

50555616565 is a deficient number, since it is larger than the sum of its proper divisors (10114935683).

50555616565 is a wasteful number, since it uses less digits than its factorization.

50555616565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635399.

The product of its (nonzero) digits is 3375000, while the sum is 49.

The spelling of 50555616565 in words is "fifty billion, five hundred fifty-five million, six hundred sixteen thousand, five hundred sixty-five".