50861721679 has 2 divisors, whose sum is σ = 50861721680. Its totient is φ = 50861721678.

The previous prime is 50861721637. The next prime is 50861721697. The reversal of 50861721679 is 97612716805.

Together with next prime (50861721697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 50861721679 - 2¹¹ = 50861719631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50861721629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25430860839 + 25430860840.

It is an arithmetic number, because the mean of its divisors is an integer number (25430860840).

Almost surely, 2^50861721679 is an apocalyptic number.

50861721679 is a deficient number, since it is larger than the sum of its proper divisors (1).

50861721679 is an equidigital number, since it uses as much as digits as its factorization.

50861721679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1270080, while the sum is 52.

The spelling of 50861721679 in words is "fifty billion, eight hundred sixty-one million, seven hundred twenty-one thousand, six hundred seventy-nine".