13669658109 has 18 divisors (see below), whose sum is σ = 20428748730. Its totient is φ = 8797644576.

The previous prime is 13669658089. The next prime is 13669658131. The reversal of 13669658109 is 90185696631.

It can be written as a sum of positive squares in 3 ways, for example, as 3969378009 + 9700280100 = 63003^2 + 98490^2 .

It is not a de Polignac number, because 13669658109 - 2¹⁵ = 13669625341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13669658159) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1885239 + ... + 1892475.

It is an arithmetic number, because the mean of its divisors is an integer number (1134930485).

Almost surely, 2^13669658109 is an apocalyptic number.

It is an amenable number.

13669658109 is a deficient number, since it is larger than the sum of its proper divisors (6759090621).

13669658109 is an frugal number, since it uses more digits than its factorization.

13669658109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14509 (or 7269 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 54.

The spelling of 13669658109 in words is "thirteen billion, six hundred sixty-nine million, six hundred fifty-eight thousand, one hundred nine".