13577208781 has 2 divisors, whose sum is σ = 13577208782. Its totient is φ = 13577208780.

The previous prime is 13577208767. The next prime is 13577208791. The reversal of 13577208781 is 18780277531.

13577208781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12439833156 + 1137375625 = 111534^2 + 33725^2 .

It is a cyclic number.

It is not a de Polignac number, because 13577208781 - 2⁷ = 13577208653 is a prime.

It is a super-2 number, since 2×13577208781² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13577208731) 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, 6788604390 + 6788604391.

It is an arithmetic number, because the mean of its divisors is an integer number (6788604391).

Almost surely, 2^13577208781 is an apocalyptic number.

It is an amenable number.

13577208781 is a deficient number, since it is larger than the sum of its proper divisors (1).

13577208781 is an equidigital number, since it uses as much as digits as its factorization.

13577208781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 658560, while the sum is 49.

The spelling of 13577208781 in words is "thirteen billion, five hundred seventy-seven million, two hundred eight thousand, seven hundred eighty-one".