1606272147221 has 6 divisors (see below), whose sum is σ = 1868520661110. Its totient is φ = 1376804697576.

The previous prime is 1606272147203. The next prime is 1606272147247. The reversal of 1606272147221 is 1227412726061.

It can be written as a sum of positive squares in only one way, i.e., 947723667121 + 658548480100 = 973511^2 + 811510^2 .

It is not a de Polignac number, because 1606272147221 - 2¹⁸ = 1606271885077 is a prime.

It is a super-2 number, since 2×1606272147221² (a number of 25 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 (1606272146221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16390532066 + ... + 16390532163.

It is an arithmetic number, because the mean of its divisors is an integer number (311420110185).

Almost surely, 2^{1606272147221} is an apocalyptic number.

It is an amenable number.

1606272147221 is a deficient number, since it is larger than the sum of its proper divisors (262248513889).

1606272147221 is an equidigital number, since it uses as much as digits as its factorization.

1606272147221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32781064243 (or 32781064236 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 1606272147221 in words is "one trillion, six hundred six billion, two hundred seventy-two million, one hundred forty-seven thousand, two hundred twenty-one".