13401165523 has 4 divisors (see below), whose sum is σ = 13401644760. Its totient is φ = 13400686288.

The previous prime is 13401165517. The next prime is 13401165551. The reversal of 13401165523 is 32556110431.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13401165523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13401166523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194890 + ... + 254527.

It is an arithmetic number, because the mean of its divisors is an integer number (3350411190).

Almost surely, 2^13401165523 is an apocalyptic number.

13401165523 is a deficient number, since it is larger than the sum of its proper divisors (479237).

13401165523 is an equidigital number, since it uses as much as digits as its factorization.

13401165523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479236.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 13401165523 its reverse (32556110431), we get a palindrome (45957275954).

The spelling of 13401165523 in words is "thirteen billion, four hundred one million, one hundred sixty-five thousand, five hundred twenty-three".