50821840969 has 27 divisors (see below), whose sum is σ = 54969535327. Its totient is φ = 46977463808.

The previous prime is 50821840963. The next prime is 50821841009. The reversal of 50821840969 is 96904812805.

The square root of 50821840969 is 225437.

It is a perfect power (a square), and thus also a powerful number.

50821840969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 13 ways, for example, as 46003815225 + 4818025744 = 214485^2 + 69412^2 .

It is not a de Polignac number, because 50821840969 - 2⁹ = 50821840457 is a prime.

It is a super-2 number, since 2×50821840969² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50821840963) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 341086107 + ... + 341086255.

Almost surely, 2^50821840969 is an apocalyptic number.

50821840969 is the 225437-th square number.

50821840969 is the 112719-th centered octagonal number.

It is an amenable number.

50821840969 is a deficient number, since it is larger than the sum of its proper divisors (4147694358).

50821840969 is an frugal number, since it uses more digits than its factorization.

50821840969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 52.

The spelling of 50821840969 in words is "fifty billion, eight hundred twenty-one million, eight hundred forty thousand, nine hundred sixty-nine".