71336078173 has 2 divisors, whose sum is σ = 71336078174. Its totient is φ = 71336078172.

The previous prime is 71336078171. The next prime is 71336078201. The reversal of 71336078173 is 37187063317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63404750809 + 7931327364 = 251803^2 + 89058^2 .

It is a cyclic number.

It is not a de Polignac number, because 71336078173 - 2¹ = 71336078171 is a prime.

Together with 71336078171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71336078171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35668039086 + 35668039087.

It is an arithmetic number, because the mean of its divisors is an integer number (35668039087).

Almost surely, 2^71336078173 is an apocalyptic number.

It is an amenable number.

71336078173 is a deficient number, since it is larger than the sum of its proper divisors (1).

71336078173 is an equidigital number, since it uses as much as digits as its factorization.

71336078173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 46.

The spelling of 71336078173 in words is "seventy-one billion, three hundred thirty-six million, seventy-eight thousand, one hundred seventy-three".