71440736663 has 2 divisors, whose sum is σ = 71440736664. Its totient is φ = 71440736662.

The previous prime is 71440736659. The next prime is 71440736671. The reversal of 71440736663 is 36663704417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71440736663 - 2² = 71440736659 is a prime.

It is a super-2 number, since 2×71440736663² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71440736363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35720368331 + 35720368332.

It is an arithmetic number, because the mean of its divisors is an integer number (35720368332).

Almost surely, 2^71440736663 is an apocalyptic number.

71440736663 is a deficient number, since it is larger than the sum of its proper divisors (1).

71440736663 is an equidigital number, since it uses as much as digits as its factorization.

71440736663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1524096, while the sum is 47.

The spelling of 71440736663 in words is "seventy-one billion, four hundred forty million, seven hundred thirty-six thousand, six hundred sixty-three".