13646464649 has 16 divisors (see below), whose sum is σ = 14291365440. Its totient is φ = 13019348160.

The previous prime is 13646464613. The next prime is 13646464679. The reversal of 13646464649 is 94646464631.

It is a cyclic number.

It is not a de Polignac number, because 13646464649 - 2⁸ = 13646464393 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13646464649.

It is not an unprimeable number, because it can be changed into a prime (13646464679) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381179 + ... + 415439.

It is an arithmetic number, because the mean of its divisors is an integer number (893210340).

Almost surely, 2^13646464649 is an apocalyptic number.

It is an amenable number.

13646464649 is a deficient number, since it is larger than the sum of its proper divisors (644900791).

13646464649 is a wasteful number, since it uses less digits than its factorization.

13646464649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34520.

The product of its digits is 8957952, while the sum is 53.

The spelling of 13646464649 in words is "thirteen billion, six hundred forty-six million, four hundred sixty-four thousand, six hundred forty-nine".