646533441 has 8 divisors (see below), whose sum is σ = 957827360. Its totient is φ = 431022276.

The previous prime is 646533439. The next prime is 646533467. The reversal of 646533441 is 144335646.

646533441 is a `hidden beast` number, since 646 + 5 + 3 + 3 + 4 + 4 + 1 = 666.

It is not a de Polignac number, because 646533441 - 2¹ = 646533439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646533396 and 646533405.

It is not an unprimeable number, because it can be changed into a prime (646533941) 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 7 ways as a sum of consecutive naturals, for example, 11972815 + ... + 11972868.

It is an arithmetic number, because the mean of its divisors is an integer number (119728420).

Almost surely, 2^646533441 is an apocalyptic number.

It is an amenable number.

646533441 is a deficient number, since it is larger than the sum of its proper divisors (311293919).

646533441 is a wasteful number, since it uses less digits than its factorization.

646533441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23945692 (or 23945686 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 646533441 is about 25427.0218665104. The cubic root of 646533441 is about 864.6964268241.

The spelling of 646533441 in words is "six hundred forty-six million, five hundred thirty-three thousand, four hundred forty-one".