13106372187781 has 2 divisors, whose sum is σ = 13106372187782. Its totient is φ = 13106372187780.

The previous prime is 13106372187749. The next prime is 13106372187791. The reversal of 13106372187781 is 18778127360131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9610093000225 + 3496279187556 = 3100015^2 + 1869834^2 .

It is a cyclic number.

It is not a de Polignac number, because 13106372187781 - 2⁵ = 13106372187749 is a prime.

It is a super-2 number, since 2×13106372187781² (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 (13106372187721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6553186093890 + 6553186093891.

It is an arithmetic number, because the mean of its divisors is an integer number (6553186093891).

Almost surely, 2^{13106372187781} is an apocalyptic number.

It is an amenable number.

13106372187781 is a deficient number, since it is larger than the sum of its proper divisors (1).

13106372187781 is an equidigital number, since it uses as much as digits as its factorization.

13106372187781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 55.

The spelling of 13106372187781 in words is "thirteen trillion, one hundred six billion, three hundred seventy-two million, one hundred eighty-seven thousand, seven hundred eighty-one".