16432344463721 has 2 divisors, whose sum is σ = 16432344463722. Its totient is φ = 16432344463720.

The previous prime is 16432344463699. The next prime is 16432344463729. The reversal of 16432344463721 is 12736444323461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15645822030400 + 786522433321 = 3955480^2 + 886861^2 .

It is a cyclic number.

It is not a de Polignac number, because 16432344463721 - 2³⁰ = 16431270721897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16432344463721.

It is not a weakly prime, because it can be changed into another prime (16432344463729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8216172231860 + 8216172231861.

It is an arithmetic number, because the mean of its divisors is an integer number (8216172231861).

Almost surely, 2^{16432344463721} is an apocalyptic number.

It is an amenable number.

16432344463721 is a deficient number, since it is larger than the sum of its proper divisors (1).

16432344463721 is an equidigital number, since it uses as much as digits as its factorization.

16432344463721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6967296, while the sum is 50.

The spelling of 16432344463721 in words is "sixteen trillion, four hundred thirty-two billion, three hundred forty-four million, four hundred sixty-three thousand, seven hundred twenty-one".