71303581663 has 2 divisors, whose sum is σ = 71303581664. Its totient is φ = 71303581662.

The previous prime is 71303581639. The next prime is 71303581667. The reversal of 71303581663 is 36618530317.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (36618530317) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71303581663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71303581667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35651790831 + 35651790832.

It is an arithmetic number, because the mean of its divisors is an integer number (35651790832).

Almost surely, 2^71303581663 is an apocalyptic number.

71303581663 is a deficient number, since it is larger than the sum of its proper divisors (1).

71303581663 is an equidigital number, since it uses as much as digits as its factorization.

71303581663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 71303581663 in words is "seventy-one billion, three hundred three million, five hundred eighty-one thousand, six hundred sixty-three".