13959216961849 has 16 divisors (see below), whose sum is σ = 14726471371200. Its totient is φ = 13195250804736.

The previous prime is 13959216961847. The next prime is 13959216961853. The reversal of 13959216961849 is 94816961295931.

It is a cyclic number.

It is not a de Polignac number, because 13959216961849 - 2¹ = 13959216961847 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13959216961847) 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 15 ways as a sum of consecutive naturals, for example, 15105177 + ... + 16002649.

It is an arithmetic number, because the mean of its divisors is an integer number (920404460700).

Almost surely, 2^{13959216961849} is an apocalyptic number.

13959216961849 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13959216961849 is a deficient number, since it is larger than the sum of its proper divisors (767254409351).

13959216961849 is an equidigital number, since it uses as much as digits as its factorization.

13959216961849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899304.

The product of its digits is 226748160, while the sum is 73.

The spelling of 13959216961849 in words is "thirteen trillion, nine hundred fifty-nine billion, two hundred sixteen million, nine hundred sixty-one thousand, eight hundred forty-nine".