13875565400065 has 8 divisors (see below), whose sum is σ = 16650704019240. Its totient is φ = 11100435293952.

The previous prime is 13875565400041. The next prime is 13875565400077. The reversal of 13875565400065 is 56000456557831.

It is a Cunningham number, because it is equal to 3724992²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 3515040024336 + 10360525375729 = 1874844^2 + 3218777^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13875565400065 - 2¹⁷ = 13875565268993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13875565399979 and 13875565400015.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2292247 + ... + 5745043.

It is an arithmetic number, because the mean of its divisors is an integer number (2081338002405).

Almost surely, 2^{13875565400065} is an apocalyptic number.

It is an amenable number.

13875565400065 is a deficient number, since it is larger than the sum of its proper divisors (2775138619175).

13875565400065 is an equidigital number, since it uses as much as digits as its factorization.

13875565400065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4256531.

The product of its (nonzero) digits is 15120000, while the sum is 55.

The spelling of 13875565400065 in words is "thirteen trillion, eight hundred seventy-five billion, five hundred sixty-five million, four hundred thousand, sixty-five".