71718954360217 has 8 divisors (see below), whose sum is σ = 71749353288456. Its totient is φ = 71688561681792.

The previous prime is 71718954360203. The next prime is 71718954360239. The reversal of 71718954360217 is 71206345981717.

It can be written as a sum of positive squares in 4 ways, for example, as 238084467721 + 71480869892496 = 487939^2 + 8454636^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 71718954360217 - 2¹⁹ = 71718953835929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71718954366217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21465003 + ... + 24580159.

It is an arithmetic number, because the mean of its divisors is an integer number (8968669161057).

It is a 1-persistent number, because it is pandigital, but 2⋅71718954360217 = 143437908720434 is not.

Almost surely, 2^{71718954360217} is an apocalyptic number.

It is an amenable number.

71718954360217 is a deficient number, since it is larger than the sum of its proper divisors (30398928239).

71718954360217 is a wasteful number, since it uses less digits than its factorization.

71718954360217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3124907.

The product of its (nonzero) digits is 17781120, while the sum is 61.

The spelling of 71718954360217 in words is "seventy-one trillion, seven hundred eighteen billion, nine hundred fifty-four million, three hundred sixty thousand, two hundred seventeen".