16001603144641 has 2 divisors, whose sum is σ = 16001603144642. Its totient is φ = 16001603144640.

The previous prime is 16001603144623. The next prime is 16001603144669. The reversal of 16001603144641 is 14644130610061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15815256385600 + 186346759041 = 3976840^2 + 431679^2 .

It is a cyclic number.

It is not a de Polignac number, because 16001603144641 - 2⁹ = 16001603144129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16001603144641.

It is not a weakly prime, because it can be changed into another prime (16001603144671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8000801572320 + 8000801572321.

It is an arithmetic number, because the mean of its divisors is an integer number (8000801572321).

Almost surely, 2^{16001603144641} is an apocalyptic number.

It is an amenable number.

16001603144641 is a deficient number, since it is larger than the sum of its proper divisors (1).

16001603144641 is an equidigital number, since it uses as much as digits as its factorization.

16001603144641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 37.

The spelling of 16001603144641 in words is "sixteen trillion, one billion, six hundred three million, one hundred forty-four thousand, six hundred forty-one".