16780146102649 has 2 divisors, whose sum is σ = 16780146102650. Its totient is φ = 16780146102648.

The previous prime is 16780146102647. The next prime is 16780146102721. The reversal of 16780146102649 is 94620164108761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10710663471225 + 6069482631424 = 3272715^2 + 2463632^2 .

It is a cyclic number.

It is not a de Polignac number, because 16780146102649 - 2¹ = 16780146102647 is a prime.

Together with 16780146102647, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 16780146102649.

It is not a weakly prime, because it can be changed into another prime (16780146102641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8390073051324 + 8390073051325.

It is an arithmetic number, because the mean of its divisors is an integer number (8390073051325).

Almost surely, 2^{16780146102649} is an apocalyptic number.

It is an amenable number.

16780146102649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16780146102649 is an equidigital number, since it uses as much as digits as its factorization.

16780146102649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 16780146102649 in words is "sixteen trillion, seven hundred eighty billion, one hundred forty-six million, one hundred two thousand, six hundred forty-nine".