50021197807613 has 2 divisors, whose sum is σ = 50021197807614. Its totient is φ = 50021197807612.

The previous prime is 50021197807589. The next prime is 50021197807649. The reversal of 50021197807613 is 31670879112005.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48529238161849 + 1491959645764 = 6966293^2 + 1221458^2 .

It is a cyclic number.

It is not a de Polignac number, because 50021197807613 - 2¹⁸ = 50021197545469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50021197807663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25010598903806 + 25010598903807.

It is an arithmetic number, because the mean of its divisors is an integer number (25010598903807).

Almost surely, 2^{50021197807613} is an apocalyptic number.

It is an amenable number.

50021197807613 is a deficient number, since it is larger than the sum of its proper divisors (1).

50021197807613 is an equidigital number, since it uses as much as digits as its factorization.

50021197807613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 635040, while the sum is 50.

The spelling of 50021197807613 in words is "fifty trillion, twenty-one billion, one hundred ninety-seven million, eight hundred seven thousand, six hundred thirteen".