13581612503 has 2 divisors, whose sum is σ = 13581612504. Its totient is φ = 13581612502.

The previous prime is 13581612497. The next prime is 13581612553. The reversal of 13581612503 is 30521618531.

It is a weak prime.

It is an emirp because it is prime and its reverse (30521618531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13581612503 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13581612553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6790806251 + 6790806252.

It is an arithmetic number, because the mean of its divisors is an integer number (6790806252).

Almost surely, 2^13581612503 is an apocalyptic number.

13581612503 is a deficient number, since it is larger than the sum of its proper divisors (1).

13581612503 is an equidigital number, since it uses as much as digits as its factorization.

13581612503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The spelling of 13581612503 in words is "thirteen billion, five hundred eighty-one million, six hundred twelve thousand, five hundred three".