50686949809 has 4 divisors (see below), whose sum is σ = 50692639216. Its totient is φ = 50681260404.

The previous prime is 50686949791. The next prime is 50686949837. The reversal of 50686949809 is 90894968605.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 50686949809 - 2⁹ = 50686949297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (50686943809) 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, 2831319 + ... + 2849164.

It is an arithmetic number, because the mean of its divisors is an integer number (12673159804).

Almost surely, 2^50686949809 is an apocalyptic number.

It is an amenable number.

50686949809 is a deficient number, since it is larger than the sum of its proper divisors (5689407).

50686949809 is an equidigital number, since it uses as much as digits as its factorization.

50686949809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5689406.

The product of its (nonzero) digits is 33592320, while the sum is 64.

The spelling of 50686949809 in words is "fifty billion, six hundred eighty-six million, nine hundred forty-nine thousand, eight hundred nine".