13054799981 has 2 divisors, whose sum is σ = 13054799982. Its totient is φ = 13054799980.

The previous prime is 13054799971. The next prime is 13054800013. The reversal of 13054799981 is 18999745031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10254802756 + 2799997225 = 101266^2 + 52915^2 .

It is a cyclic number.

It is not a de Polignac number, because 13054799981 - 2¹⁴ = 13054783597 is a prime.

It is a super-2 number, since 2×13054799981² (a number of 21 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 (13054799921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6527399990 + 6527399991.

It is an arithmetic number, because the mean of its divisors is an integer number (6527399991).

Almost surely, 2^13054799981 is an apocalyptic number.

It is an amenable number.

13054799981 is a deficient number, since it is larger than the sum of its proper divisors (1).

13054799981 is an equidigital number, since it uses as much as digits as its factorization.

13054799981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 56.

The spelling of 13054799981 in words is "thirteen billion, fifty-four million, seven hundred ninety-nine thousand, nine hundred eighty-one".