71644073117 has 2 divisors, whose sum is σ = 71644073118. Its totient is φ = 71644073116.

The previous prime is 71644073101. The next prime is 71644073119. The reversal of 71644073117 is 71137044617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61655869636 + 9988203481 = 248306^2 + 99941^2 .

It is a cyclic number.

It is not a de Polignac number, because 71644073117 - 2⁴ = 71644073101 is a prime.

Together with 71644073119, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71644073119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35822036558 + 35822036559.

It is an arithmetic number, because the mean of its divisors is an integer number (35822036559).

Almost surely, 2^71644073117 is an apocalyptic number.

It is an amenable number.

71644073117 is a deficient number, since it is larger than the sum of its proper divisors (1).

71644073117 is an equidigital number, since it uses as much as digits as its factorization.

71644073117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98784, while the sum is 41.

The spelling of 71644073117 in words is "seventy-one billion, six hundred forty-four million, seventy-three thousand, one hundred seventeen".