50646831485209 has 4 divisors (see below), whose sum is σ = 50864199860916. Its totient is φ = 50429463109504.

The previous prime is 50646831485153. The next prime is 50646831485219. The reversal of 50646831485209 is 90258413864605.

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 31586648040000 + 19060183445209 = 5620200^2 + 4365797^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50646831485209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50646831485219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108684187504 + ... + 108684187969.

It is an arithmetic number, because the mean of its divisors is an integer number (12716049965229).

Almost surely, 2^{50646831485209} is an apocalyptic number.

It is an amenable number.

50646831485209 is a deficient number, since it is larger than the sum of its proper divisors (217368375707).

50646831485209 is a wasteful number, since it uses less digits than its factorization.

50646831485209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217368375706.

The product of its (nonzero) digits is 49766400, while the sum is 61.

The spelling of 50646831485209 in words is "fifty trillion, six hundred forty-six billion, eight hundred thirty-one million, four hundred eighty-five thousand, two hundred nine".