219929109649 has 2 divisors, whose sum is σ = 219929109650. Its totient is φ = 219929109648.

The previous prime is 219929109641. The next prime is 219929109661. The reversal of 219929109649 is 946901929912.

219929109649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 219272110225 + 656999424 = 468265^2 + 25632^2 .

It is a cyclic number.

It is not a de Polignac number, because 219929109649 - 2³ = 219929109641 is a prime.

It is not a weakly prime, because it can be changed into another prime (219929109641) 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, 109964554824 + 109964554825.

It is an arithmetic number, because the mean of its divisors is an integer number (109964554825).

Almost surely, 2^219929109649 is an apocalyptic number.

It is an amenable number.

219929109649 is a deficient number, since it is larger than the sum of its proper divisors (1).

219929109649 is an equidigital number, since it uses as much as digits as its factorization.

219929109649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5668704, while the sum is 61.

The spelling of 219929109649 in words is "two hundred nineteen billion, nine hundred twenty-nine million, one hundred nine thousand, six hundred forty-nine".