219378044590867 has 2 divisors, whose sum is σ = 219378044590868. Its totient is φ = 219378044590866.

The previous prime is 219378044590829. The next prime is 219378044590877. The reversal of 219378044590867 is 768095440873912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-219378044590867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 219378044590867.

It is not a weakly prime, because it can be changed into another prime (219378044590807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109689022295433 + 109689022295434.

It is an arithmetic number, because the mean of its divisors is an integer number (109689022295434).

It is a 1-persistent number, because it is pandigital, but 2⋅219378044590867 = 438756089181734 is not.

Almost surely, 2^{219378044590867} is an apocalyptic number.

219378044590867 is a deficient number, since it is larger than the sum of its proper divisors (1).

219378044590867 is an equidigital number, since it uses as much as digits as its factorization.

219378044590867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 731566080, while the sum is 73.

The spelling of 219378044590867 in words is "two hundred nineteen trillion, three hundred seventy-eight billion, forty-four million, five hundred ninety thousand, eight hundred sixty-seven".