51891986359 has 2 divisors, whose sum is σ = 51891986360. Its totient is φ = 51891986358.

The previous prime is 51891986309. The next prime is 51891986423. The reversal of 51891986359 is 95368919815.

51891986359 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (51891986423) can be obtained adding 51891986359 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51891986359 - 2¹⁵ = 51891953591 is a prime.

It is a super-3 number, since 3×51891986359³ (a number of 33 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51891986359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51891986309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25945993179 + 25945993180.

It is an arithmetic number, because the mean of its divisors is an integer number (25945993180).

Almost surely, 2^51891986359 is an apocalyptic number.

51891986359 is a deficient number, since it is larger than the sum of its proper divisors (1).

51891986359 is an equidigital number, since it uses as much as digits as its factorization.

51891986359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20995200, while the sum is 64.

The spelling of 51891986359 in words is "fifty-one billion, eight hundred ninety-one million, nine hundred eighty-six thousand, three hundred fifty-nine".