981481564099 has 2 divisors, whose sum is σ = 981481564100. Its totient is φ = 981481564098.

The previous prime is 981481564087. The next prime is 981481564103. The reversal of 981481564099 is 990465184189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981481564099 - 2³¹ = 979334080451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 981481564099.

It is not a weakly prime, because it can be changed into another prime (981481564069) 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, 490740782049 + 490740782050.

It is an arithmetic number, because the mean of its divisors is an integer number (490740782050).

Almost surely, 2^981481564099 is an apocalyptic number.

981481564099 is a deficient number, since it is larger than the sum of its proper divisors (1).

981481564099 is an equidigital number, since it uses as much as digits as its factorization.

981481564099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22394880, while the sum is 64.

The spelling of 981481564099 in words is "nine hundred eighty-one billion, four hundred eighty-one million, five hundred sixty-four thousand, ninety-nine".