7881984811 has 2 divisors, whose sum is σ = 7881984812. Its totient is φ = 7881984810.

The previous prime is 7881984769. The next prime is 7881984821. The reversal of 7881984811 is 1184891887.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7881984811 - 2⁷ = 7881984683 is a prime.

It is not a weakly prime, because it can be changed into another prime (7881984821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3940992405 + 3940992406.

It is an arithmetic number, because the mean of its divisors is an integer number (3940992406).

Almost surely, 2^7881984811 is an apocalyptic number.

7881984811 is a deficient number, since it is larger than the sum of its proper divisors (1).

7881984811 is an equidigital number, since it uses as much as digits as its factorization.

7881984811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1032192, while the sum is 55.

The square root of 7881984811 is about 88780.5429753614. The cubic root of 7881984811 is about 1990.1166409750.

The spelling of 7881984811 in words is "seven billion, eight hundred eighty-one million, nine hundred eighty-four thousand, eight hundred eleven".