16870778843 has 2 divisors, whose sum is σ = 16870778844. Its totient is φ = 16870778842.

The previous prime is 16870778809. The next prime is 16870778861. The reversal of 16870778843 is 34887707861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16870778843 - 2²⁶ = 16803669979 is a prime.

It is not a weakly prime, because it can be changed into another prime (16870778143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8435389421 + 8435389422.

It is an arithmetic number, because the mean of its divisors is an integer number (8435389422).

Almost surely, 2^16870778843 is an apocalyptic number.

16870778843 is a deficient number, since it is larger than the sum of its proper divisors (1).

16870778843 is an equidigital number, since it uses as much as digits as its factorization.

16870778843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12644352, while the sum is 59.

The spelling of 16870778843 in words is "sixteen billion, eight hundred seventy million, seven hundred seventy-eight thousand, eight hundred forty-three".