51986050509 has 16 divisors (see below), whose sum is σ = 69633475200. Its totient is φ = 34498067136.

The previous prime is 51986050469. The next prime is 51986050561. The reversal of 51986050509 is 90505068915.

It is a happy number.

51986050509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51986050509 - 2⁷ = 51986050381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51986050709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5518087 + ... + 5527499.

It is an arithmetic number, because the mean of its divisors is an integer number (4352092200).

Almost surely, 2^51986050509 is an apocalyptic number.

It is an amenable number.

51986050509 is a deficient number, since it is larger than the sum of its proper divisors (17647424691).

51986050509 is a wasteful number, since it uses less digits than its factorization.

51986050509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17684.

The product of its (nonzero) digits is 486000, while the sum is 48.

The spelling of 51986050509 in words is "fifty-one billion, nine hundred eighty-six million, fifty thousand, five hundred nine".