13721608543 has 2 divisors, whose sum is σ = 13721608544. Its totient is φ = 13721608542.

The previous prime is 13721608541. The next prime is 13721608591. The reversal of 13721608543 is 34580612731.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13721608543 - 2¹ = 13721608541 is a prime.

Together with 13721608541, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 13721608496 and 13721608505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13721608541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6860804271 + 6860804272.

It is an arithmetic number, because the mean of its divisors is an integer number (6860804272).

Almost surely, 2^13721608543 is an apocalyptic number.

13721608543 is a deficient number, since it is larger than the sum of its proper divisors (1).

13721608543 is an equidigital number, since it uses as much as digits as its factorization.

13721608543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 13721608543 in words is "thirteen billion, seven hundred twenty-one million, six hundred eight thousand, five hundred forty-three".