51728355319 has 2 divisors, whose sum is σ = 51728355320. Its totient is φ = 51728355318.

The previous prime is 51728355227. The next prime is 51728355353. The reversal of 51728355319 is 91355382715.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51728355319 is a prime.

It is a super-2 number, since 2×51728355319² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51728355359) 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 as a sum of consecutive naturals, namely, 25864177659 + 25864177660.

It is an arithmetic number, because the mean of its divisors is an integer number (25864177660).

Almost surely, 2^51728355319 is an apocalyptic number.

51728355319 is a deficient number, since it is larger than the sum of its proper divisors (1).

51728355319 is an equidigital number, since it uses as much as digits as its factorization.

51728355319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1134000, while the sum is 49.

The spelling of 51728355319 in words is "fifty-one billion, seven hundred twenty-eight million, three hundred fifty-five thousand, three hundred nineteen".