71180316064549 has 2 divisors, whose sum is σ = 71180316064550. Its totient is φ = 71180316064548.

The previous prime is 71180316064519. The next prime is 71180316064573. The reversal of 71180316064549 is 94546061308117.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54857827252449 + 16322488812100 = 7406607^2 + 4040110^2 .

It is a cyclic number.

It is not a de Polignac number, because 71180316064549 - 2¹³ = 71180316056357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71180316064549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71180316064519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35590158032274 + 35590158032275.

It is an arithmetic number, because the mean of its divisors is an integer number (35590158032275).

Almost surely, 2^{71180316064549} is an apocalyptic number.

It is an amenable number.

71180316064549 is a deficient number, since it is larger than the sum of its proper divisors (1).

71180316064549 is an equidigital number, since it uses as much as digits as its factorization.

71180316064549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 71180316064549 in words is "seventy-one trillion, one hundred eighty billion, three hundred sixteen million, sixty-four thousand, five hundred forty-nine".