13155486661 has 2 divisors, whose sum is σ = 13155486662. Its totient is φ = 13155486660.

The previous prime is 13155486653. The next prime is 13155486677. The reversal of 13155486661 is 16668455131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11744056900 + 1411429761 = 108370^2 + 37569^2 .

It is a cyclic number.

It is not a de Polignac number, because 13155486661 - 2³ = 13155486653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13155486691) 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, 6577743330 + 6577743331.

It is an arithmetic number, because the mean of its divisors is an integer number (6577743331).

Almost surely, 2^13155486661 is an apocalyptic number.

It is an amenable number.

13155486661 is a deficient number, since it is larger than the sum of its proper divisors (1).

13155486661 is an equidigital number, since it uses as much as digits as its factorization.

13155486661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 46.

The spelling of 13155486661 in words is "thirteen billion, one hundred fifty-five million, four hundred eighty-six thousand, six hundred sixty-one".