4221605017717 has 4 divisors (see below), whose sum is σ = 4221742609260. Its totient is φ = 4221467426176.

The previous prime is 4221605017703. The next prime is 4221605017723. The reversal of 4221605017717 is 7177105061224.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2440965644881 + 1780639372836 = 1562359^2 + 1334406^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4221605017717 is a prime.

It is a super-2 number, since 2×4221605017717² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221605015717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68749738 + ... + 68811115.

It is an arithmetic number, because the mean of its divisors is an integer number (1055435652315).

Almost surely, 2^{4221605017717} is an apocalyptic number.

It is an amenable number.

4221605017717 is a deficient number, since it is larger than the sum of its proper divisors (137591543).

4221605017717 is a wasteful number, since it uses less digits than its factorization.

4221605017717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137591542.

The product of its (nonzero) digits is 164640, while the sum is 43.

The spelling of 4221605017717 in words is "four trillion, two hundred twenty-one billion, six hundred five million, seventeen thousand, seven hundred seventeen".