13518544643 has 2 divisors, whose sum is σ = 13518544644. Its totient is φ = 13518544642.

The previous prime is 13518544577. The next prime is 13518544661. The reversal of 13518544643 is 34644581531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13518544643 - 2¹² = 13518540547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13518544594 and 13518544603.

It is not a weakly prime, because it can be changed into another prime (13518544043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6759272321 + 6759272322.

It is an arithmetic number, because the mean of its divisors is an integer number (6759272322).

Almost surely, 2^13518544643 is an apocalyptic number.

13518544643 is a deficient number, since it is larger than the sum of its proper divisors (1).

13518544643 is an equidigital number, since it uses as much as digits as its factorization.

13518544643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 691200, while the sum is 44.

The spelling of 13518544643 in words is "thirteen billion, five hundred eighteen million, five hundred forty-four thousand, six hundred forty-three".