13550589649 has 9 divisors (see below), whose sum is σ = 13791143323. Its totient is φ = 13314167032.

The previous prime is 13550589631. The next prime is 13550589673. The reversal of 13550589649 is 94698505531.

The square root of 13550589649 is 116407.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2914380225 + 10636209424 = 53985^2 + 103132^2 .

It is not a de Polignac number, because 13550589649 - 2⁵ = 13550589617 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 13550589649.

It is not an unprimeable number, because it can be changed into a prime (13550589049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 6867027 + ... + 6868999.

Almost surely, 2^13550589649 is an apocalyptic number.

13550589649 is the 116407-th square number.

13550589649 is the 58204-th centered octagonal number.

It is an amenable number.

13550589649 is a deficient number, since it is larger than the sum of its proper divisors (240553674).

13550589649 is an frugal number, since it uses more digits than its factorization.

13550589649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4064 (or 2032 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 55.

The spelling of 13550589649 in words is "thirteen billion, five hundred fifty million, five hundred eighty-nine thousand, six hundred forty-nine".