13565565001 has 4 divisors (see below), whose sum is σ = 14003163904. Its totient is φ = 13127966100.

The previous prime is 13565564983. The next prime is 13565565017. The reversal of 13565565001 is 10056556531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13565565001 is a prime.

It is a super-2 number, since 2×13565565001² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13565505001) 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, 218799405 + ... + 218799466.

It is an arithmetic number, because the mean of its divisors is an integer number (3500790976).

Almost surely, 2^13565565001 is an apocalyptic number.

It is an amenable number.

13565565001 is a deficient number, since it is larger than the sum of its proper divisors (437598903).

13565565001 is an equidigital number, since it uses as much as digits as its factorization.

13565565001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437598902.

The product of its (nonzero) digits is 67500, while the sum is 37.

The spelling of 13565565001 in words is "thirteen billion, five hundred sixty-five million, five hundred sixty-five thousand, one".