51366043143409 has 2 divisors, whose sum is σ = 51366043143410. Its totient is φ = 51366043143408.

The previous prime is 51366043143407. The next prime is 51366043143469. The reversal of 51366043143409 is 90434134066315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34839541665009 + 16526501478400 = 5902503^2 + 4065280^2 .

It is a cyclic number.

It is not a de Polignac number, because 51366043143409 - 2¹ = 51366043143407 is a prime.

Together with 51366043143407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51366043143403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25683021571704 + 25683021571705.

It is an arithmetic number, because the mean of its divisors is an integer number (25683021571705).

Almost surely, 2^{51366043143409} is an apocalyptic number.

It is an amenable number.

51366043143409 is a deficient number, since it is larger than the sum of its proper divisors (1).

51366043143409 is an equidigital number, since it uses as much as digits as its factorization.

51366043143409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2799360, while the sum is 49.

The spelling of 51366043143409 in words is "fifty-one trillion, three hundred sixty-six billion, forty-three million, one hundred forty-three thousand, four hundred nine".