161603463571441 has 2 divisors, whose sum is σ = 161603463571442. Its totient is φ = 161603463571440.

The previous prime is 161603463571339. The next prime is 161603463571453. The reversal of 161603463571441 is 144175364306161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115373377440000 + 46230086131441 = 10741200^2 + 6799271^2 .

It is a cyclic number.

It is not a de Polignac number, because 161603463571441 - 2¹¹ = 161603463569393 is a prime.

It is a super-2 number, since 2×161603463571441² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161603463571481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80801731785720 + 80801731785721.

It is an arithmetic number, because the mean of its divisors is an integer number (80801731785721).

Almost surely, 2^{161603463571441} is an apocalyptic number.

It is an amenable number.

161603463571441 is a deficient number, since it is larger than the sum of its proper divisors (1).

161603463571441 is an equidigital number, since it uses as much as digits as its factorization.

161603463571441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 161603463571441 in words is "one hundred sixty-one trillion, six hundred three billion, four hundred sixty-three million, five hundred seventy-one thousand, four hundred forty-one".