1646702216 has 8 divisors (see below), whose sum is σ = 3087566670. Its totient is φ = 823351104.

The previous prime is 1646702207. The next prime is 1646702221. The reversal of 1646702216 is 6122076461.

It can be written as a sum of positive squares in only one way, i.e., 1636526116 + 10176100 = 40454^2 + 3190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-4 number, since 4×1646702216⁴ (a number of 38 digits) contains 4444 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102918881 + ... + 102918896.

Almost surely, 2^1646702216 is an apocalyptic number.

It is an amenable number.

1646702216 is a deficient number, since it is larger than the sum of its proper divisors (1440864454).

1646702216 is a wasteful number, since it uses less digits than its factorization.

1646702216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205837783 (or 205837779 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1646702216 is about 40579.5788051084. The cubic root of 1646702216 is about 1180.8779772420.

Adding to 1646702216 its reverse (6122076461), we get a palindrome (7768778677).

The spelling of 1646702216 in words is "one billion, six hundred forty-six million, seven hundred two thousand, two hundred sixteen".