478304782661 has 2 divisors, whose sum is σ = 478304782662. Its totient is φ = 478304782660.

The previous prime is 478304782603. The next prime is 478304782687. The reversal of 478304782661 is 166287403874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 472235593636 + 6069189025 = 687194^2 + 77905^2 .

It is a cyclic number.

It is not a de Polignac number, because 478304782661 - 2⁶ = 478304782597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 478304782597 and 478304782606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (478304787661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239152391330 + 239152391331.

It is an arithmetic number, because the mean of its divisors is an integer number (239152391331).

Almost surely, 2^478304782661 is an apocalyptic number.

It is an amenable number.

478304782661 is a deficient number, since it is larger than the sum of its proper divisors (1).

478304782661 is an equidigital number, since it uses as much as digits as its factorization.

478304782661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 56.

The spelling of 478304782661 in words is "four hundred seventy-eight billion, three hundred four million, seven hundred eighty-two thousand, six hundred sixty-one".