50518383886721 has 2 divisors, whose sum is σ = 50518383886722. Its totient is φ = 50518383886720.

The previous prime is 50518383886699. The next prime is 50518383886727. The reversal of 50518383886721 is 12768838381505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41251011063025 + 9267372823696 = 6422695^2 + 3044236^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-50518383886721 is a prime.

It is a super-2 number, since 2×50518383886721² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (50518383886727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25259191943360 + 25259191943361.

It is an arithmetic number, because the mean of its divisors is an integer number (25259191943361).

Almost surely, 2^{50518383886721} is an apocalyptic number.

It is an amenable number.

50518383886721 is a deficient number, since it is larger than the sum of its proper divisors (1).

50518383886721 is an equidigital number, since it uses as much as digits as its factorization.

50518383886721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77414400, while the sum is 65.

The spelling of 50518383886721 in words is "fifty trillion, five hundred eighteen billion, three hundred eighty-three million, eight hundred eighty-six thousand, seven hundred twenty-one".