71061654173 has 2 divisors, whose sum is σ = 71061654174. Its totient is φ = 71061654172.

The previous prime is 71061654137. The next prime is 71061654193. The reversal of 71061654173 is 37145616017.

Together with previous prime (71061654137) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70438752409 + 622901764 = 265403^2 + 24958^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71061654173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71061654173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71061654193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35530827086 + 35530827087.

It is an arithmetic number, because the mean of its divisors is an integer number (35530827087).

Almost surely, 2^71061654173 is an apocalyptic number.

It is an amenable number.

71061654173 is a deficient number, since it is larger than the sum of its proper divisors (1).

71061654173 is an equidigital number, since it uses as much as digits as its factorization.

71061654173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 71061654173 in words is "seventy-one billion, sixty-one million, six hundred fifty-four thousand, one hundred seventy-three".