1606981833 has 6 divisors (see below), whose sum is σ = 2321195994. Its totient is φ = 1071321216.

The previous prime is 1606981807. The next prime is 1606981861. The reversal of 1606981833 is 3381896061.

It is a happy number.

1606981833 is a `hidden beast` number, since 1 + 606 + 9 + 8 + 1 + 8 + 33 = 666.

1606981833 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 1596561849 + 10419984 = 39957^2 + 3228^2 .

It is not a de Polignac number, because 1606981833 - 2⁸ = 1606981577 is a prime.

It is a super-2 number, since 2×1606981833² = 5164781223184079778, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1606981433) 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, 89276760 + ... + 89276777.

It is an arithmetic number, because the mean of its divisors is an integer number (386865999).

Almost surely, 2^1606981833 is an apocalyptic number.

It is an amenable number.

1606981833 is a deficient number, since it is larger than the sum of its proper divisors (714214161).

1606981833 is a wasteful number, since it uses less digits than its factorization.

1606981833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178553543 (or 178553540 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 1606981833 is about 40087.1779126443. The cubic root of 1606981833 is about 1171.3058770103.

The spelling of 1606981833 in words is "one billion, six hundred six million, nine hundred eighty-one thousand, eight hundred thirty-three".