13132549981 has 2 divisors, whose sum is σ = 13132549982. Its totient is φ = 13132549980.

The previous prime is 13132549957. The next prime is 13132550027. The reversal of 13132549981 is 18994523131.

It is an a-pointer prime, because the next prime (13132550027) can be obtained adding 13132549981 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10948483225 + 2184066756 = 104635^2 + 46734^2 .

It is a cyclic number.

It is not a de Polignac number, because 13132549981 - 2¹¹ = 13132547933 is a prime.

It is a super-4 number, since 4×13132549981⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13132549951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6566274990 + 6566274991.

It is an arithmetic number, because the mean of its divisors is an integer number (6566274991).

Almost surely, 2^13132549981 is an apocalyptic number.

It is an amenable number.

13132549981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13132549981 is an equidigital number, since it uses as much as digits as its factorization.

13132549981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The spelling of 13132549981 in words is "thirteen billion, one hundred thirty-two million, five hundred forty-nine thousand, nine hundred eighty-one".