116821811867 has 2 divisors, whose sum is σ = 116821811868. Its totient is φ = 116821811866.

The previous prime is 116821811863. The next prime is 116821811891. The reversal of 116821811867 is 768118128611.

It is a weak prime.

It is an emirp because it is prime and its reverse (768118128611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116821811867 - 2² = 116821811863 is a prime.

It is not a weakly prime, because it can be changed into another prime (116821811863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58410905933 + 58410905934.

It is an arithmetic number, because the mean of its divisors is an integer number (58410905934).

Almost surely, 2^116821811867 is an apocalyptic number.

116821811867 is a deficient number, since it is larger than the sum of its proper divisors (1).

116821811867 is an equidigital number, since it uses as much as digits as its factorization.

116821811867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 50.

The spelling of 116821811867 in words is "one hundred sixteen billion, eight hundred twenty-one million, eight hundred eleven thousand, eight hundred sixty-seven".