13664565573 has 8 divisors (see below), whose sum is σ = 18229218336. Its totient is φ = 9104811600.

The previous prime is 13664565511. The next prime is 13664565589. The reversal of 13664565573 is 37556546631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13664565573 - 2¹⁷ = 13664434501 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13664565373) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1218183 + ... + 1229348.

It is an arithmetic number, because the mean of its divisors is an integer number (2278652292).

Almost surely, 2^13664565573 is an apocalyptic number.

It is an amenable number.

13664565573 is a deficient number, since it is larger than the sum of its proper divisors (4564652763).

13664565573 is a wasteful number, since it uses less digits than its factorization.

13664565573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2449395.

The product of its digits is 6804000, while the sum is 51.

The spelling of 13664565573 in words is "thirteen billion, six hundred sixty-four million, five hundred sixty-five thousand, five hundred seventy-three".