13645977871 has 2 divisors, whose sum is σ = 13645977872. Its totient is φ = 13645977870.

The previous prime is 13645977853. The next prime is 13645977887. The reversal of 13645977871 is 17877954631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13645977871 - 2⁷ = 13645977743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13645977071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6822988935 + 6822988936.

It is an arithmetic number, because the mean of its divisors is an integer number (6822988936).

Almost surely, 2^13645977871 is an apocalyptic number.

13645977871 is a deficient number, since it is larger than the sum of its proper divisors (1).

13645977871 is an equidigital number, since it uses as much as digits as its factorization.

13645977871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8890560, while the sum is 58.

The spelling of 13645977871 in words is "thirteen billion, six hundred forty-five million, nine hundred seventy-seven thousand, eight hundred seventy-one".