13162341001781 has 2 divisors, whose sum is σ = 13162341001782. Its totient is φ = 13162341001780.

The previous prime is 13162341001751. The next prime is 13162341001787. The reversal of 13162341001781 is 18710014326131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7715111756881 + 5447229244900 = 2777609^2 + 2333930^2 .

It is a cyclic number.

It is not a de Polignac number, because 13162341001781 - 2³⁸ = 12887463094837 is a prime.

It is a super-2 number, since 2×13162341001781² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13162341001787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6581170500890 + 6581170500891.

It is an arithmetic number, because the mean of its divisors is an integer number (6581170500891).

Almost surely, 2^{13162341001781} is an apocalyptic number.

It is an amenable number.

13162341001781 is a deficient number, since it is larger than the sum of its proper divisors (1).

13162341001781 is an equidigital number, since it uses as much as digits as its factorization.

13162341001781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 13162341001781 in words is "thirteen trillion, one hundred sixty-two billion, three hundred forty-one million, one thousand, seven hundred eighty-one".