71620341329 has 2 divisors, whose sum is σ = 71620341330. Its totient is φ = 71620341328.

The previous prime is 71620341283. The next prime is 71620341349. The reversal of 71620341329 is 92314302617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70462640704 + 1157700625 = 265448^2 + 34025^2 .

It is a cyclic number.

It is not a de Polignac number, because 71620341329 - 2³² = 67325374033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71620341292 and 71620341301.

It is not a weakly prime, because it can be changed into another prime (71620341349) 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, 35810170664 + 35810170665.

It is an arithmetic number, because the mean of its divisors is an integer number (35810170665).

Almost surely, 2^71620341329 is an apocalyptic number.

It is an amenable number.

71620341329 is a deficient number, since it is larger than the sum of its proper divisors (1).

71620341329 is an equidigital number, since it uses as much as digits as its factorization.

71620341329 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 38.

The spelling of 71620341329 in words is "seventy-one billion, six hundred twenty million, three hundred forty-one thousand, three hundred twenty-nine".