50144654561 has 4 divisors (see below), whose sum is σ = 50145137172. Its totient is φ = 50144171952.

The previous prime is 50144654543. The next prime is 50144654569. The reversal of 50144654561 is 16545644105.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 28339702336 + 21804952225 = 168344^2 + 147665^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50144654561 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 (50144654569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14210 + ... + 317003.

It is an arithmetic number, because the mean of its divisors is an integer number (12536284293).

Almost surely, 2^50144654561 is an apocalyptic number.

It is an amenable number.

50144654561 is a deficient number, since it is larger than the sum of its proper divisors (482611).

50144654561 is a wasteful number, since it uses less digits than its factorization.

50144654561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482610.

The product of its (nonzero) digits is 288000, while the sum is 41.

The spelling of 50144654561 in words is "fifty billion, one hundred forty-four million, six hundred fifty-four thousand, five hundred sixty-one".