16780196659 has 4 divisors (see below), whose sum is σ = 17358824160. Its totient is φ = 16201569160.

The previous prime is 16780196639. The next prime is 16780196663. The reversal of 16780196659 is 95669108761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95669108761 = 17 ⋅5627594633.

It is a cyclic number.

It is not a de Polignac number, because 16780196659 - 2²³ = 16771808051 is a prime.

It is a Smith number, since the sum of its digits (58) 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 not an unprimeable number, because it can be changed into a prime (16780196639) 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, 289313707 + ... + 289313764.

It is an arithmetic number, because the mean of its divisors is an integer number (4339706040).

Almost surely, 2^16780196659 is an apocalyptic number.

16780196659 is a deficient number, since it is larger than the sum of its proper divisors (578627501).

16780196659 is an equidigital number, since it uses as much as digits as its factorization.

16780196659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578627500.

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 16780196659 in words is "sixteen billion, seven hundred eighty million, one hundred ninety-six thousand, six hundred fifty-nine".