7071716386865 has 8 divisors (see below), whose sum is σ = 9138833484648. Its totient is φ = 5222190562560.

The previous prime is 7071716386817. The next prime is 7071716386883. The reversal of 7071716386865 is 5686836171707.

It can be written as a sum of positive squares in 4 ways, for example, as 591071891344 + 6480644495521 = 768812^2 + 2545711^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7071716386865 - 2²² = 7071712192561 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65), and also a Moran number because the ratio is a prime number: 108795636721 = 7071716386865 / (7 + 0 + 7 + 1 + 7 + 1 + 6 + 3 + 8 + 6 + 8 + 6 + 5).

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54397818296 + ... + 54397818425.

It is an arithmetic number, because the mean of its divisors is an integer number (1142354185581).

Almost surely, 2^{7071716386865} is an apocalyptic number.

It is an amenable number.

7071716386865 is a deficient number, since it is larger than the sum of its proper divisors (2067117097783).

7071716386865 is a wasteful number, since it uses less digits than its factorization.

7071716386865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108795636739.

The product of its (nonzero) digits is 71124480, while the sum is 65.

The spelling of 7071716386865 in words is "seven trillion, seventy-one billion, seven hundred sixteen million, three hundred eighty-six thousand, eight hundred sixty-five".