13618656559 has 2 divisors, whose sum is σ = 13618656560. Its totient is φ = 13618656558.

The previous prime is 13618656553. The next prime is 13618656643. The reversal of 13618656559 is 95565681631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13618656559 - 2²⁵ = 13585102127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13618656553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6809328279 + 6809328280.

It is an arithmetic number, because the mean of its divisors is an integer number (6809328280).

Almost surely, 2^13618656559 is an apocalyptic number.

13618656559 is a deficient number, since it is larger than the sum of its proper divisors (1).

13618656559 is an equidigital number, since it uses as much as digits as its factorization.

13618656559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832000, while the sum is 55.

The spelling of 13618656559 in words is "thirteen billion, six hundred eighteen million, six hundred fifty-six thousand, five hundred fifty-nine".