1605120116 has 6 divisors (see below), whose sum is σ = 2808960210. Its totient is φ = 802560056.

The previous prime is 1605120109. The next prime is 1605120137. The reversal of 1605120116 is 6110215061.

It can be written as a sum of positive squares in only one way, i.e., 1295712016 + 309408100 = 35996^2 + 17590^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1605120091 and 1605120100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200640011 + ... + 200640018.

It is an arithmetic number, because the mean of its divisors is an integer number (468160035).

Almost surely, 2^1605120116 is an apocalyptic number.

It is an amenable number.

1605120116 is a deficient number, since it is larger than the sum of its proper divisors (1203840094).

1605120116 is a wasteful number, since it uses less digits than its factorization.

1605120116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401280033 (or 401280031 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 23.

The square root of 1605120116 is about 40063.9503294421. The cubic root of 1605120116 is about 1170.8533759999.

Adding to 1605120116 its reverse (6110215061), we get a palindrome (7715335177).

The spelling of 1605120116 in words is "one billion, six hundred five million, one hundred twenty thousand, one hundred sixteen".