13534978565 has 8 divisors (see below), whose sum is σ = 16282888440. Its totient is φ = 10800706752.

The previous prime is 13534978543. The next prime is 13534978601. The reversal of 13534978565 is 56587943531.

13534978565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 821739556 + 12713239009 = 28666^2 + 112753^2 .

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 13534978565 - 2⁸ = 13534978309 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13534978565.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3407330 + ... + 3411299.

It is an arithmetic number, because the mean of its divisors is an integer number (2035361055).

Almost surely, 2^13534978565 is an apocalyptic number.

It is an amenable number.

13534978565 is a deficient number, since it is larger than the sum of its proper divisors (2747909875).

13534978565 is an equidigital number, since it uses as much as digits as its factorization.

13534978565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6819031.

The product of its digits is 13608000, while the sum is 56.

The spelling of 13534978565 in words is "thirteen billion, five hundred thirty-four million, nine hundred seventy-eight thousand, five hundred sixty-five".