71438220079 has 2 divisors, whose sum is σ = 71438220080. Its totient is φ = 71438220078.

The previous prime is 71438220047. The next prime is 71438220083. The reversal of 71438220079 is 97002283417.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71438220079 - 2⁵ = 71438220047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71438220089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35719110039 + 35719110040.

It is an arithmetic number, because the mean of its divisors is an integer number (35719110040).

Almost surely, 2^71438220079 is an apocalyptic number.

71438220079 is a deficient number, since it is larger than the sum of its proper divisors (1).

71438220079 is an equidigital number, since it uses as much as digits as its factorization.

71438220079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 71438220079 in words is "seventy-one billion, four hundred thirty-eight million, two hundred twenty thousand, seventy-nine".