51672281781559 has 2 divisors, whose sum is σ = 51672281781560. Its totient is φ = 51672281781558.

The previous prime is 51672281781557. The next prime is 51672281781619. The reversal of 51672281781559 is 95518718227615.

51672281781559 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 is a cyclic number.

It is not a de Polignac number, because 51672281781559 - 2¹ = 51672281781557 is a prime.

Together with 51672281781557, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51672281781494 and 51672281781503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51672281781551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25836140890779 + 25836140890780.

It is an arithmetic number, because the mean of its divisors is an integer number (25836140890780).

Almost surely, 2^{51672281781559} is an apocalyptic number.

51672281781559 is a deficient number, since it is larger than the sum of its proper divisors (1).

51672281781559 is an equidigital number, since it uses as much as digits as its factorization.

51672281781559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672000, while the sum is 67.

The spelling of 51672281781559 in words is "fifty-one trillion, six hundred seventy-two billion, two hundred eighty-one million, seven hundred eighty-one thousand, five hundred fifty-nine".