13601256503 has 4 divisors (see below), whose sum is σ = 13792823568. Its totient is φ = 13409689440.

The previous prime is 13601256481. The next prime is 13601256511. The reversal of 13601256503 is 30565210631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30565210631 = 193 ⋅158368967.

It is a cyclic number.

It is not a de Polignac number, because 13601256503 - 2⁸ = 13601256247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13601256503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13601456503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95783426 + ... + 95783567.

It is an arithmetic number, because the mean of its divisors is an integer number (3448205892).

Almost surely, 2^13601256503 is an apocalyptic number.

13601256503 is a deficient number, since it is larger than the sum of its proper divisors (191567065).

13601256503 is an equidigital number, since it uses as much as digits as its factorization.

13601256503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191567064.

The product of its (nonzero) digits is 16200, while the sum is 32.

The spelling of 13601256503 in words is "thirteen billion, six hundred one million, two hundred fifty-six thousand, five hundred three".