16840367729 has 2 divisors, whose sum is σ = 16840367730. Its totient is φ = 16840367728.

The previous prime is 16840367689. The next prime is 16840367771. The reversal of 16840367729 is 92776304861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14526757729 + 2313610000 = 120527^2 + 48100^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16840367729 is a prime.

It is not a weakly prime, because it can be changed into another prime (16840367629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8420183864 + 8420183865.

It is an arithmetic number, because the mean of its divisors is an integer number (8420183865).

Almost surely, 2^16840367729 is an apocalyptic number.

It is an amenable number.

16840367729 is a deficient number, since it is larger than the sum of its proper divisors (1).

16840367729 is an equidigital number, since it uses as much as digits as its factorization.

16840367729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 16840367729 in words is "sixteen billion, eight hundred forty million, three hundred sixty-seven thousand, seven hundred twenty-nine".