641044049 has 2 divisors, whose sum is σ = 641044050. Its totient is φ = 641044048.

The previous prime is 641044013. The next prime is 641044067. The reversal of 641044049 is 940440146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 329168449 + 311875600 = 18143^2 + 17660^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-641044049 is a prime.

It is not a weakly prime, because it can be changed into another prime (641044099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320522024 + 320522025.

It is an arithmetic number, because the mean of its divisors is an integer number (320522025).

Almost surely, 2^641044049 is an apocalyptic number.

It is an amenable number.

641044049 is a deficient number, since it is larger than the sum of its proper divisors (1).

641044049 is an equidigital number, since it uses as much as digits as its factorization.

641044049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 641044049 is about 25318.8477028478. The cubic root of 641044049 is about 862.2422329622.

The spelling of 641044049 in words is "six hundred forty-one million, forty-four thousand, forty-nine".