61882784221 has 2 divisors, whose sum is σ = 61882784222. Its totient is φ = 61882784220.

The previous prime is 61882784149. The next prime is 61882784233. The reversal of 61882784221 is 12248728816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60974424900 + 908359321 = 246930^2 + 30139^2 .

It is a cyclic number.

It is not a de Polignac number, because 61882784221 - 2¹⁷ = 61882653149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61882784261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30941392110 + 30941392111.

It is an arithmetic number, because the mean of its divisors is an integer number (30941392111).

Almost surely, 2^61882784221 is an apocalyptic number.

It is an amenable number.

61882784221 is a deficient number, since it is larger than the sum of its proper divisors (1).

61882784221 is an equidigital number, since it uses as much as digits as its factorization.

61882784221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 688128, while the sum is 49.

The spelling of 61882784221 in words is "sixty-one billion, eight hundred eighty-two million, seven hundred eighty-four thousand, two hundred twenty-one".