50144542565 has 16 divisors (see below), whose sum is σ = 64835864688. Its totient is φ = 37010566656.

The previous prime is 50144542561. The next prime is 50144542597. The reversal of 50144542565 is 56524544105.

It can be written as a sum of positive squares in 8 ways, for example, as 58997761 + 50085544804 = 7681^2 + 223798^2 .

It is a cyclic number.

It is not a de Polignac number, because 50144542565 - 2² = 50144542561 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 (50144542561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73904 + ... + 325193.

It is an arithmetic number, because the mean of its divisors is an integer number (4052241543).

Almost surely, 2^50144542565 is an apocalyptic number.

It is an amenable number.

50144542565 is a deficient number, since it is larger than the sum of its proper divisors (14691322123).

50144542565 is a wasteful number, since it uses less digits than its factorization.

50144542565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401048.

The product of its (nonzero) digits is 480000, while the sum is 41.

The spelling of 50144542565 in words is "fifty billion, one hundred forty-four million, five hundred forty-two thousand, five hundred sixty-five".