50520515909 has 4 divisors (see below), whose sum is σ = 50522971500. Its totient is φ = 50518060320.

The previous prime is 50520515897. The next prime is 50520516001. The reversal of 50520515909 is 90951502505.

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 1214313409 + 49306202500 = 34847^2 + 222050^2 .

It is a cyclic number.

It is not a de Polignac number, because 50520515909 - 2⁸ = 50520515653 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 (50520515009) 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, 1196672 + ... + 1238169.

It is an arithmetic number, because the mean of its divisors is an integer number (12630742875).

Almost surely, 2^50520515909 is an apocalyptic number.

It is an amenable number.

50520515909 is a deficient number, since it is larger than the sum of its proper divisors (2455591).

50520515909 is a wasteful number, since it uses less digits than its factorization.

50520515909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2455590.

The product of its (nonzero) digits is 101250, while the sum is 41.

The spelling of 50520515909 in words is "fifty billion, five hundred twenty million, five hundred fifteen thousand, nine hundred nine".