13209745975623 has 64 divisors (see below), whose sum is σ = 20833491755520. Its totient is φ = 8243613374976.

The previous prime is 13209745975619. The next prime is 13209745975631. The reversal of 13209745975623 is 32657954790231.

13209745975623 is a `hidden beast` number, since 1 + 3 + 2 + 0 + 97 + 459 + 75 + 6 + 23 = 666.

It is not a de Polignac number, because 13209745975623 - 2² = 13209745975619 is a prime.

It is a super-2 number, since 2×13209745975623² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13209745975693) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 103816840 + ... + 103944002.

It is an arithmetic number, because the mean of its divisors is an integer number (325523308680).

Almost surely, 2^{13209745975623} is an apocalyptic number.

13209745975623 is a deficient number, since it is larger than the sum of its proper divisors (7623745779897).

13209745975623 is a wasteful number, since it uses less digits than its factorization.

13209745975623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128413 (or 128407 counting only the distinct ones).

The product of its (nonzero) digits is 85730400, while the sum is 63.

The spelling of 13209745975623 in words is "thirteen trillion, two hundred nine billion, seven hundred forty-five million, nine hundred seventy-five thousand, six hundred twenty-three".