1605650216 has 16 divisors (see below), whose sum is σ = 3017751540. Its totient is φ = 800916480.

The previous prime is 1605650213. The next prime is 1605650297. The reversal of 1605650216 is 6120565061.

It can be written as a sum of positive squares in 2 ways, for example, as 1432622500 + 173027716 = 37850^2 + 13154^2 .

It is a super-2 number, since 2×1605650216² = 5156225232281693312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1605650213) 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, 235001 + ... + 241736.

Almost surely, 2^1605650216 is an apocalyptic number.

It is an amenable number.

1605650216 is a deficient number, since it is larger than the sum of its proper divisors (1412101324).

1605650216 is a wasteful number, since it uses less digits than its factorization.

1605650216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477164 (or 477160 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1605650216 is about 40070.5654564544. The cubic root of 1605650216 is about 1170.9822554639.

The spelling of 1605650216 in words is "one billion, six hundred five million, six hundred fifty thousand, two hundred sixteen".