71263617629 has 2 divisors, whose sum is σ = 71263617630. Its totient is φ = 71263617628.

The previous prime is 71263617589. The next prime is 71263617643. The reversal of 71263617629 is 92671636217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51575318404 + 19688299225 = 227102^2 + 140315^2 .

It is an emirp because it is prime and its reverse (92671636217) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71263617629 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71263617679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35631808814 + 35631808815.

It is an arithmetic number, because the mean of its divisors is an integer number (35631808815).

Almost surely, 2^71263617629 is an apocalyptic number.

It is an amenable number.

71263617629 is a deficient number, since it is larger than the sum of its proper divisors (1).

71263617629 is an equidigital number, since it uses as much as digits as its factorization.

71263617629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 50.

The spelling of 71263617629 in words is "seventy-one billion, two hundred sixty-three million, six hundred seventeen thousand, six hundred twenty-nine".