50021197807729 has 2 divisors, whose sum is σ = 50021197807730. Its totient is φ = 50021197807728.

The previous prime is 50021197807717. The next prime is 50021197807771. The reversal of 50021197807729 is 92770879112005.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49930150780129 + 91047027600 = 7066127^2 + 301740^2 .

It is a cyclic number.

It is not a de Polignac number, because 50021197807729 - 2²³ = 50021189419121 is a prime.

It is not a weakly prime, because it can be changed into another prime (50021197807799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25010598903864 + 25010598903865.

It is an arithmetic number, because the mean of its divisors is an integer number (25010598903865).

Almost surely, 2^{50021197807729} is an apocalyptic number.

It is an amenable number.

50021197807729 is a deficient number, since it is larger than the sum of its proper divisors (1).

50021197807729 is an equidigital number, since it uses as much as digits as its factorization.

50021197807729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4445280, while the sum is 58.

The spelling of 50021197807729 in words is "fifty trillion, twenty-one billion, one hundred ninety-seven million, eight hundred seven thousand, seven hundred twenty-nine".