1644141033 has 6 divisors (see below), whose sum is σ = 2374870394. Its totient is φ = 1096094016.

The previous prime is 1644141029. The next prime is 1644141049. The reversal of 1644141033 is 3301414461.

1644141033 is a `hidden beast` number, since 1 + 644 + 1 + 4 + 10 + 3 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1644140304 + 729 = 40548^2 + 27^2 .

It is not a de Polignac number, because 1644141033 - 2² = 1644141029 is a prime.

It is a super-3 number, since 3×1644141033³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1644140988 and 1644141006.

It is not an unprimeable number, because it can be changed into a prime (1644141013) 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, 91341160 + ... + 91341177.

Almost surely, 2^1644141033 is an apocalyptic number.

It is an amenable number.

1644141033 is a deficient number, since it is larger than the sum of its proper divisors (730729361).

1644141033 is a wasteful number, since it uses less digits than its factorization.

1644141033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182682343 (or 182682340 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1644141033 is about 40548.0089893450. The cubic root of 1644141033 is about 1180.2654370306.

Adding to 1644141033 its reverse (3301414461), we get a palindrome (4945555494).

The spelling of 1644141033 in words is "one billion, six hundred forty-four million, one hundred forty-one thousand, thirty-three".