16785411197 has 2 divisors, whose sum is σ = 16785411198. Its totient is φ = 16785411196.

The previous prime is 16785411191. The next prime is 16785411199. The reversal of 16785411197 is 79111458761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16760150521 + 25260676 = 129461^2 + 5026^2 .

It is an emirp because it is prime and its reverse (79111458761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16785411197 is a prime.

Together with 16785411199, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16785411191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8392705598 + 8392705599.

It is an arithmetic number, because the mean of its divisors is an integer number (8392705599).

Almost surely, 2^16785411197 is an apocalyptic number.

It is an amenable number.

16785411197 is a deficient number, since it is larger than the sum of its proper divisors (1).

16785411197 is an equidigital number, since it uses as much as digits as its factorization.

16785411197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 423360, while the sum is 50.

The spelling of 16785411197 in words is "sixteen billion, seven hundred eighty-five million, four hundred eleven thousand, one hundred ninety-seven".