13797763561 has 2 divisors, whose sum is σ = 13797763562. Its totient is φ = 13797763560.

The previous prime is 13797763559. The next prime is 13797763627. The reversal of 13797763561 is 16536779731.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13211203600 + 586559961 = 114940^2 + 24219^2 .

It is a cyclic number.

It is not a de Polignac number, because 13797763561 - 2¹ = 13797763559 is a prime.

Together with 13797763559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13797763531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6898881780 + 6898881781.

It is an arithmetic number, because the mean of its divisors is an integer number (6898881781).

Almost surely, 2^13797763561 is an apocalyptic number.

It is an amenable number.

13797763561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13797763561 is an equidigital number, since it uses as much as digits as its factorization.

13797763561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5000940, while the sum is 55.

The spelling of 13797763561 in words is "thirteen billion, seven hundred ninety-seven million, seven hundred sixty-three thousand, five hundred sixty-one".