13680345799 has 4 divisors (see below), whose sum is σ = 13684385880. Its totient is φ = 13676305720.

The previous prime is 13680345779. The next prime is 13680345937. The reversal of 13680345799 is 99754308631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99754308631 = 130307 ⋅765533.

It is a cyclic number.

It is not a de Polignac number, because 13680345799 - 2⁷ = 13680345671 is a prime.

It is a super-2 number, since 2×13680345799² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13680345779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2014957 + ... + 2021734.

It is an arithmetic number, because the mean of its divisors is an integer number (3421096470).

Almost surely, 2^13680345799 is an apocalyptic number.

13680345799 is a deficient number, since it is larger than the sum of its proper divisors (4040081).

13680345799 is an equidigital number, since it uses as much as digits as its factorization.

13680345799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4040080.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 13680345799 in words is "thirteen billion, six hundred eighty million, three hundred forty-five thousand, seven hundred ninety-nine".