71297853569 has 2 divisors, whose sum is σ = 71297853570. Its totient is φ = 71297853568.

The previous prime is 71297853541. The next prime is 71297853589. The reversal of 71297853569 is 96535879217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71275650625 + 22202944 = 266975^2 + 4712^2 .

It is a cyclic number.

It is not a de Polignac number, because 71297853569 - 2²⁴ = 71281076353 is a prime.

It is a super-2 number, since 2×71297853569² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (71297853589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35648926784 + 35648926785.

It is an arithmetic number, because the mean of its divisors is an integer number (35648926785).

Almost surely, 2^71297853569 is an apocalyptic number.

It is an amenable number.

71297853569 is a deficient number, since it is larger than the sum of its proper divisors (1).

71297853569 is an equidigital number, since it uses as much as digits as its factorization.

71297853569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28576800, while the sum is 62.

The spelling of 71297853569 in words is "seventy-one billion, two hundred ninety-seven million, eight hundred fifty-three thousand, five hundred sixty-nine".