13261606403 has 4 divisors (see below), whose sum is σ = 13328924400. Its totient is φ = 13194288408.

The previous prime is 13261606399. The next prime is 13261606411. The reversal of 13261606403 is 30460616231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13261606403 - 2² = 13261606399 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 13261606403.

It is not an unprimeable number, because it can be changed into a prime (13261606493) 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, 33658703 + ... + 33659096.

It is an arithmetic number, because the mean of its divisors is an integer number (3332231100).

Almost surely, 2^13261606403 is an apocalyptic number.

13261606403 is a deficient number, since it is larger than the sum of its proper divisors (67317997).

13261606403 is an equidigital number, since it uses as much as digits as its factorization.

13261606403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67317996.

The product of its (nonzero) digits is 15552, while the sum is 32.

The spelling of 13261606403 in words is "thirteen billion, two hundred sixty-one million, six hundred six thousand, four hundred three".