3964386566217 has 16 divisors (see below), whose sum is σ = 6590149097472. Its totient is φ = 2059421592720.

The previous prime is 3964386566123. The next prime is 3964386566219. The reversal of 3964386566217 is 7126656834693.

It is not a de Polignac number, because 3964386566217 - 2⁸ = 3964386565961 is a prime.

It is a super-2 number, since 2×3964386566217² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3964386566219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8580923073 + ... + 8580923534.

It is an arithmetic number, because the mean of its divisors is an integer number (411884318592).

Almost surely, 2^{3964386566217} is an apocalyptic number.

It is an amenable number.

3964386566217 is a deficient number, since it is larger than the sum of its proper divisors (2625762531255).

3964386566217 is a wasteful number, since it uses less digits than its factorization.

3964386566217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17161846628.

The product of its digits is 235146240, while the sum is 66.

The spelling of 3964386566217 in words is "three trillion, nine hundred sixty-four billion, three hundred eighty-six million, five hundred sixty-six thousand, two hundred seventeen".