13645541243 has 2 divisors, whose sum is σ = 13645541244. Its totient is φ = 13645541242.

The previous prime is 13645541227. The next prime is 13645541291. The reversal of 13645541243 is 34214554631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13645541243 - 2⁴ = 13645541227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13645541197 and 13645541206.

It is not a weakly prime, because it can be changed into another prime (13645541293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6822770621 + 6822770622.

It is an arithmetic number, because the mean of its divisors is an integer number (6822770622).

Almost surely, 2^13645541243 is an apocalyptic number.

13645541243 is a deficient number, since it is larger than the sum of its proper divisors (1).

13645541243 is an equidigital number, since it uses as much as digits as its factorization.

13645541243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172800, while the sum is 38.

The spelling of 13645541243 in words is "thirteen billion, six hundred forty-five million, five hundred forty-one thousand, two hundred forty-three".