476331688881721 has 2 divisors, whose sum is σ = 476331688881722. Its totient is φ = 476331688881720.

The previous prime is 476331688881673. The next prime is 476331688881731. The reversal of 476331688881721 is 127188886133674.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 476227834796025 + 103854085696 = 21822645^2 + 322264^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-476331688881721 is a prime.

It is not a weakly prime, because it can be changed into another prime (476331688881731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238165844440860 + 238165844440861.

It is an arithmetic number, because the mean of its divisors is an integer number (238165844440861).

Almost surely, 2^{476331688881721} is an apocalyptic number.

It is an amenable number.

476331688881721 is a deficient number, since it is larger than the sum of its proper divisors (1).

476331688881721 is an equidigital number, since it uses as much as digits as its factorization.

476331688881721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 520224768, while the sum is 73.

The spelling of 476331688881721 in words is "four hundred seventy-six trillion, three hundred thirty-one billion, six hundred eighty-eight million, eight hundred eighty-one thousand, seven hundred twenty-one".