51719253613 has 2 divisors, whose sum is σ = 51719253614. Its totient is φ = 51719253612.

The previous prime is 51719253611. The next prime is 51719253647. The reversal of 51719253613 is 31635291715.

51719253613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47942167849 + 3777085764 = 218957^2 + 61458^2 .

It is a cyclic number.

It is not a de Polignac number, because 51719253613 - 2¹ = 51719253611 is a prime.

Together with 51719253611, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51719253613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51719253611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25859626806 + 25859626807.

It is an arithmetic number, because the mean of its divisors is an integer number (25859626807).

Almost surely, 2^51719253613 is an apocalyptic number.

It is an amenable number.

51719253613 is a deficient number, since it is larger than the sum of its proper divisors (1).

51719253613 is an equidigital number, since it uses as much as digits as its factorization.

51719253613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 43.

The spelling of 51719253613 in words is "fifty-one billion, seven hundred nineteen million, two hundred fifty-three thousand, six hundred thirteen".