2641646461 has 2 divisors, whose sum is σ = 2641646462. Its totient is φ = 2641646460.

The previous prime is 2641646411. The next prime is 2641646521. The reversal of 2641646461 is 1646461462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1910214436 + 731432025 = 43706^2 + 27045^2 .

It is a cyclic number.

It is not a de Polignac number, because 2641646461 - 2⁷ = 2641646333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2641646411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1320823230 + 1320823231.

It is an arithmetic number, because the mean of its divisors is an integer number (1320823231).

Almost surely, 2^2641646461 is an apocalyptic number.

It is an amenable number.

2641646461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2641646461 is an equidigital number, since it uses as much as digits as its factorization.

2641646461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 40.

The square root of 2641646461 is about 51396.9499192316. The cubic root of 2641646461 is about 1382.3719030195.

The spelling of 2641646461 in words is "two billion, six hundred forty-one million, six hundred forty-six thousand, four hundred sixty-one".