13680729965 has 16 divisors (see below), whose sum is σ = 18782873472. Its totient is φ = 9370707264.

The previous prime is 13680729949. The next prime is 13680729971. The reversal of 13680729965 is 56992708631.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13680729965 - 2⁴ = 13680729949 is a prime.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 13680729965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183734 + ... + 247223.

It is an arithmetic number, because the mean of its divisors is an integer number (1173929592).

Almost surely, 2^13680729965 is an apocalyptic number.

It is an amenable number.

13680729965 is a deficient number, since it is larger than the sum of its proper divisors (5102143507).

13680729965 is an equidigital number, since it uses as much as digits as its factorization.

13680729965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431876.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The spelling of 13680729965 in words is "thirteen billion, six hundred eighty million, seven hundred twenty-nine thousand, nine hundred sixty-five".