13978569305 has 8 divisors (see below), whose sum is σ = 16774924992. Its totient is φ = 11182427568.

The previous prime is 13978569281. The next prime is 13978569307. The reversal of 13978569305 is 50396587931.

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 13978569305 - 2¹⁰ = 13978568281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13978569307) 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, 196364 + ... + 257906.

It is an arithmetic number, because the mean of its divisors is an integer number (2096865624).

Almost surely, 2^13978569305 is an apocalyptic number.

It is an amenable number.

13978569305 is a deficient number, since it is larger than the sum of its proper divisors (2796355687).

13978569305 is an equidigital number, since it uses as much as digits as its factorization.

13978569305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106975.

The product of its (nonzero) digits is 6123600, while the sum is 56.

Adding to 13978569305 its sum of digits (56), we get a square (13978569361 = 118231²).

The spelling of 13978569305 in words is "thirteen billion, nine hundred seventy-eight million, five hundred sixty-nine thousand, three hundred five".