646011 has 12 divisors (see below), whose sum is σ = 940680. Its totient is φ = 427200.

The previous prime is 646003. The next prime is 646013. The reversal of 646011 is 110646.

646011 is a `hidden beast` number, since 64 + 601 + 1 = 666.

It is not a de Polignac number, because 646011 - 2³ = 646003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1411 + ... + 1811.

It is an arithmetic number, because the mean of its divisors is an integer number (78390).

2⁶⁴⁶⁰¹¹ is an apocalyptic number.

646011 is a deficient number, since it is larger than the sum of its proper divisors (294669).

646011 is a wasteful number, since it uses less digits than its factorization.

646011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 646011 is about 803.7480948655. The cubic root of 646011 is about 86.4463453774.

Adding to 646011 its reverse (110646), we get a palindrome (756657).

The spelling of 646011 in words is "six hundred forty-six thousand, eleven".