16978743345 has 16 divisors (see below), whose sum is σ = 27266984640. Its totient is φ = 9021664704.

The previous prime is 16978743323. The next prime is 16978743347. The reversal of 16978743345 is 54334787961.

It is not a de Polignac number, because 16978743345 - 2⁶ = 16978743281 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16978743347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2099899 + ... + 2107968.

It is an arithmetic number, because the mean of its divisors is an integer number (1704186540).

Almost surely, 2^16978743345 is an apocalyptic number.

16978743345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16978743345 is a deficient number, since it is larger than the sum of its proper divisors (10288241295).

16978743345 is a wasteful number, since it uses less digits than its factorization.

16978743345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4208144.

The product of its digits is 15240960, while the sum is 57.

The spelling of 16978743345 in words is "sixteen billion, nine hundred seventy-eight million, seven hundred forty-three thousand, three hundred forty-five".