646634041 has 9 divisors (see below), whose sum is σ = 659309413. Its totient is φ = 634199260.

The previous prime is 646634033. The next prime is 646634047. The reversal of 646634041 is 140436646.

The square root of 646634041 is 25429.

It is a perfect power (a square), and thus also a powerful number.

646634041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 646634041 - 2³ = 646634033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 646633988 and 646634006.

It is not an unprimeable number, because it can be changed into a prime (646634047) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1500096 + ... + 1500526.

Almost surely, 2^646634041 is an apocalyptic number.

646634041 is the 25429-th square number.

646634041 is the 12715-th centered octagonal number.

It is an amenable number.

646634041 is a deficient number, since it is larger than the sum of its proper divisors (12675372).

646634041 is an frugal number, since it uses more digits than its factorization.

646634041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 490 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The cubic root of 646634041 is about 864.7412731505.

The spelling of 646634041 in words is "six hundred forty-six million, six hundred thirty-four thousand, forty-one".