646065441 has 36 divisors (see below), whose sum is σ = 1088345232. Its totient is φ = 368235504.

The previous prime is 646065439. The next prime is 646065449. The reversal of 646065441 is 144560646.

646065441 is a `hidden beast` number, since 6 + 4 + 606 + 5 + 4 + 41 = 666.

It is not a de Polignac number, because 646065441 - 2¹ = 646065439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646065396 and 646065405.

It is not an unprimeable number, because it can be changed into a prime (646065449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 193710 + ... + 197016.

It is an arithmetic number, because the mean of its divisors is an integer number (30231812).

Almost surely, 2^646065441 is an apocalyptic number.

It is an amenable number.

646065441 is a deficient number, since it is larger than the sum of its proper divisors (442279791).

646065441 is a wasteful number, since it uses less digits than its factorization.

646065441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3770 (or 3760 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 646065441 is about 25417.8173925300. The cubic root of 646065441 is about 864.4877366080.

The spelling of 646065441 in words is "six hundred forty-six million, sixty-five thousand, four hundred forty-one".