13908358549 has 6 divisors (see below), whose sum is σ = 14678905110. Its totient is φ = 13176339336.

The previous prime is 13908358523. The next prime is 13908358553. The reversal of 13908358549 is 94585380931.

It can be written as a sum of positive squares in only one way, i.e., 11790702225 + 2117656324 = 108585^2 + 46018^2 .

It is not a de Polignac number, because 13908358549 - 2¹⁷ = 13908227477 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13908358549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13908358579) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19263294 + ... + 19264015.

It is an arithmetic number, because the mean of its divisors is an integer number (2446484185).

Almost surely, 2^13908358549 is an apocalyptic number.

13908358549 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13908358549 is a deficient number, since it is larger than the sum of its proper divisors (770546561).

13908358549 is an equidigital number, since it uses as much as digits as its factorization.

13908358549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38527347 (or 38527328 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 13908358549 in words is "thirteen billion, nine hundred eight million, three hundred fifty-eight thousand, five hundred forty-nine".