13503618641 has 2 divisors, whose sum is σ = 13503618642. Its totient is φ = 13503618640.

The previous prime is 13503618589. The next prime is 13503618647. The reversal of 13503618641 is 14681630531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11556250000 + 1947368641 = 107500^2 + 44129^2 .

It is an emirp because it is prime and its reverse (14681630531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13503618641 - 2¹⁴ = 13503602257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13503618595 and 13503618604.

It is not a weakly prime, because it can be changed into another prime (13503618647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6751809320 + 6751809321.

It is an arithmetic number, because the mean of its divisors is an integer number (6751809321).

Almost surely, 2^13503618641 is an apocalyptic number.

It is an amenable number.

13503618641 is a deficient number, since it is larger than the sum of its proper divisors (1).

13503618641 is an equidigital number, since it uses as much as digits as its factorization.

13503618641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 13503618641 in words is "thirteen billion, five hundred three million, six hundred eighteen thousand, six hundred forty-one".