16940428885979 has 4 divisors (see below), whose sum is σ = 17004841163376. Its totient is φ = 16876016608584.

The previous prime is 16940428885949. The next prime is 16940428886077. The reversal of 16940428885979 is 97958882404961.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16940428885979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16940428885949) 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, 32206138304 + ... + 32206138829.

It is an arithmetic number, because the mean of its divisors is an integer number (4251210290844).

Almost surely, 2^{16940428885979} is an apocalyptic number.

16940428885979 is a deficient number, since it is larger than the sum of its proper divisors (64412277397).

16940428885979 is an equidigital number, since it uses as much as digits as its factorization.

16940428885979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64412277396.

The product of its (nonzero) digits is 2508226560, while the sum is 80.

The spelling of 16940428885979 in words is "sixteen trillion, nine hundred forty billion, four hundred twenty-eight million, eight hundred eighty-five thousand, nine hundred seventy-nine".