51928116397 has 2 divisors, whose sum is σ = 51928116398. Its totient is φ = 51928116396.

The previous prime is 51928116379. The next prime is 51928116433. The reversal of 51928116397 is 79361182915.

Together with previous prime (51928116379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44658678276 + 7269438121 = 211326^2 + 85261^2 .

It is a cyclic number.

It is not a de Polignac number, because 51928116397 - 2¹¹ = 51928114349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51928111397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25964058198 + 25964058199.

It is an arithmetic number, because the mean of its divisors is an integer number (25964058199).

Almost surely, 2^51928116397 is an apocalyptic number.

It is an amenable number.

51928116397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51928116397 is an equidigital number, since it uses as much as digits as its factorization.

51928116397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 52.

The spelling of 51928116397 in words is "fifty-one billion, nine hundred twenty-eight million, one hundred sixteen thousand, three hundred ninety-seven".