13980526561 has 2 divisors, whose sum is σ = 13980526562. Its totient is φ = 13980526560.

The previous prime is 13980526541. The next prime is 13980526579. The reversal of 13980526561 is 16562508931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10992264336 + 2988262225 = 104844^2 + 54665^2 .

It is an emirp because it is prime and its reverse (16562508931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13980526561 - 2⁵ = 13980526529 is a prime.

It is not a weakly prime, because it can be changed into another prime (13980526541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6990263280 + 6990263281.

It is an arithmetic number, because the mean of its divisors is an integer number (6990263281).

Almost surely, 2^13980526561 is an apocalyptic number.

It is an amenable number.

13980526561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13980526561 is an equidigital number, since it uses as much as digits as its factorization.

13980526561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 13980526561 in words is "thirteen billion, nine hundred eighty million, five hundred twenty-six thousand, five hundred sixty-one".