51672281781619 has 2 divisors, whose sum is σ = 51672281781620. Its totient is φ = 51672281781618.

The previous prime is 51672281781559. The next prime is 51672281781721. The reversal of 51672281781619 is 91618718227615.

51672281781619 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 51672281781619 - 2²⁹ = 51671744910707 is a prime.

It is a super-2 number, since 2×51672281781619² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51672281581619) 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, 25836140890809 + 25836140890810.

It is an arithmetic number, because the mean of its divisors is an integer number (25836140890810).

Almost surely, 2^{51672281781619} is an apocalyptic number.

51672281781619 is a deficient number, since it is larger than the sum of its proper divisors (1).

51672281781619 is an equidigital number, since it uses as much as digits as its factorization.

51672281781619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20321280, while the sum is 64.

The spelling of 51672281781619 in words is "fifty-one trillion, six hundred seventy-two billion, two hundred eighty-one million, seven hundred eighty-one thousand, six hundred nineteen".