71820079129061 has 2 divisors, whose sum is σ = 71820079129062. Its totient is φ = 71820079129060.

The previous prime is 71820079129037. The next prime is 71820079129109. The reversal of 71820079129061 is 16092197002817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41829461704900 + 29990617424161 = 6467570^2 + 5476369^2 .

It is a cyclic number.

It is not a de Polignac number, because 71820079129061 - 2¹⁰ = 71820079128037 is a prime.

It is a super-2 number, since 2×71820079129061² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71820079128994 and 71820079129012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71820079149061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35910039564530 + 35910039564531.

It is an arithmetic number, because the mean of its divisors is an integer number (35910039564531).

Almost surely, 2^{71820079129061} is an apocalyptic number.

It is an amenable number.

71820079129061 is a deficient number, since it is larger than the sum of its proper divisors (1).

71820079129061 is an equidigital number, since it uses as much as digits as its factorization.

71820079129061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 53.

The spelling of 71820079129061 in words is "seventy-one trillion, eight hundred twenty billion, seventy-nine million, one hundred twenty-nine thousand, sixty-one".