13451167531661 has 2 divisors, whose sum is σ = 13451167531662. Its totient is φ = 13451167531660.

The previous prime is 13451167531619. The next prime is 13451167531741. The reversal of 13451167531661 is 16613576115431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7141053675625 + 6310113856036 = 2672275^2 + 2511994^2 .

It is an emirp because it is prime and its reverse (16613576115431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13451167531661 is a prime.

It is a super-2 number, since 2×13451167531661² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13451167231661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6725583765830 + 6725583765831.

It is an arithmetic number, because the mean of its divisors is an integer number (6725583765831).

Almost surely, 2^{13451167531661} is an apocalyptic number.

It is an amenable number.

13451167531661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13451167531661 is an equidigital number, since it uses as much as digits as its factorization.

13451167531661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 50.

The spelling of 13451167531661 in words is "thirteen trillion, four hundred fifty-one billion, one hundred sixty-seven million, five hundred thirty-one thousand, six hundred sixty-one".