9878044811 has 2 divisors, whose sum is σ = 9878044812. Its totient is φ = 9878044810.

The previous prime is 9878044801. The next prime is 9878044867. The reversal of 9878044811 is 1184408789.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9878044811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9878044811.

It is not a weakly prime, because it can be changed into another prime (9878044801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4939022405 + 4939022406.

It is an arithmetic number, because the mean of its divisors is an integer number (4939022406).

Almost surely, 2^9878044811 is an apocalyptic number.

9878044811 is a deficient number, since it is larger than the sum of its proper divisors (1).

9878044811 is an equidigital number, since it uses as much as digits as its factorization.

9878044811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 50.

The square root of 9878044811 is about 99388.3534977816. The cubic root of 9878044811 is about 2145.6406937761.

The spelling of 9878044811 in words is "nine billion, eight hundred seventy-eight million, forty-four thousand, eight hundred eleven".