71688447707 has 2 divisors, whose sum is σ = 71688447708. Its totient is φ = 71688447706.

The previous prime is 71688447641. The next prime is 71688447709. The reversal of 71688447707 is 70774488617.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71688447707 - 2⁸ = 71688447451 is a prime.

Together with 71688447709, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71688447709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35844223853 + 35844223854.

It is an arithmetic number, because the mean of its divisors is an integer number (35844223854).

Almost surely, 2^71688447707 is an apocalyptic number.

71688447707 is a deficient number, since it is larger than the sum of its proper divisors (1).

71688447707 is an equidigital number, since it uses as much as digits as its factorization.

71688447707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14751744, while the sum is 59.

The spelling of 71688447707 in words is "seventy-one billion, six hundred eighty-eight million, four hundred forty-seven thousand, seven hundred seven".