75829686996221 has 2 divisors, whose sum is σ = 75829686996222. Its totient is φ = 75829686996220.

The previous prime is 75829686996211. The next prime is 75829686996289. The reversal of 75829686996221 is 12269968692857.

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., 49285861711321 + 26543825284900 = 7020389^2 + 5152070^2 .

It is an emirp because it is prime and its reverse (12269968692857) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75829686996221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75829686996211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37914843498110 + 37914843498111.

It is an arithmetic number, because the mean of its divisors is an integer number (37914843498111).

Almost surely, 2^{75829686996221} is an apocalyptic number.

It is an amenable number.

75829686996221 is a deficient number, since it is larger than the sum of its proper divisors (1).

75829686996221 is an equidigital number, since it uses as much as digits as its factorization.

75829686996221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2821754880, while the sum is 80.

The spelling of 75829686996221 in words is "seventy-five trillion, eight hundred twenty-nine billion, six hundred eighty-six million, nine hundred ninety-six thousand, two hundred twenty-one".