63781204335889 has 2 divisors, whose sum is σ = 63781204335890. Its totient is φ = 63781204335888.

The previous prime is 63781204335853. The next prime is 63781204335923. The reversal of 63781204335889 is 98853340218736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55391103950400 + 8390100385489 = 7442520^2 + 2896567^2 .

It is a cyclic number.

It is not a de Polignac number, because 63781204335889 - 2¹¹ = 63781204333841 is a prime.

It is not a weakly prime, because it can be changed into another prime (63781204365889) 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, 31890602167944 + 31890602167945.

It is an arithmetic number, because the mean of its divisors is an integer number (31890602167945).

It is a 1-persistent number, because it is pandigital, but 2⋅63781204335889 = 127562408671778 is not.

Almost surely, 2^{63781204335889} is an apocalyptic number.

It is an amenable number.

63781204335889 is a deficient number, since it is larger than the sum of its proper divisors (1).

63781204335889 is an equidigital number, since it uses as much as digits as its factorization.

63781204335889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209018880, while the sum is 67.

The spelling of 63781204335889 in words is "sixty-three trillion, seven hundred eighty-one billion, two hundred four million, three hundred thirty-five thousand, eight hundred eighty-nine".