13784682865 has 8 divisors (see below), whose sum is σ = 16542249768. Its totient is φ = 11027326080.

The previous prime is 13784682809. The next prime is 13784682881. The reversal of 13784682865 is 56828648731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1407675361 + 12377007504 = 37519^2 + 111252^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-13784682865 is a prime.

It is a Duffinian number.

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, 228309 + ... + 282301.

It is an arithmetic number, because the mean of its divisors is an integer number (2067781221).

Almost surely, 2^13784682865 is an apocalyptic number.

It is an amenable number.

13784682865 is a deficient number, since it is larger than the sum of its proper divisors (2757566903).

13784682865 is an equidigital number, since it uses as much as digits as its factorization.

13784682865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105059.

The product of its digits is 15482880, while the sum is 58.

The spelling of 13784682865 in words is "thirteen billion, seven hundred eighty-four million, six hundred eighty-two thousand, eight hundred sixty-five".