50890820549 has 18 divisors (see below), whose sum is σ = 53177550930. Its totient is φ = 48644499456.

The previous prime is 50890820537. The next prime is 50890820557. The reversal of 50890820549 is 94502809805.

It can be written as a sum of positive squares in 3 ways, for example, as 38963996449 + 11926824100 = 197393^2 + 109210^2 .

It is not a de Polignac number, because 50890820549 - 2¹² = 50890816453 is a prime.

It is a super-2 number, since 2×50890820549² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 50890820497 and 50890820506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50890820249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 198018629 + ... + 198018885.

It is an arithmetic number, because the mean of its divisors is an integer number (2954308385).

Almost surely, 2^50890820549 is an apocalyptic number.

It is an amenable number.

50890820549 is a deficient number, since it is larger than the sum of its proper divisors (2286730381).

50890820549 is an frugal number, since it uses more digits than its factorization.

50890820549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 449 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 50890820549 in words is "fifty billion, eight hundred ninety million, eight hundred twenty thousand, five hundred forty-nine".