81106803707 has 2 divisors, whose sum is σ = 81106803708. Its totient is φ = 81106803706.

The previous prime is 81106803683. The next prime is 81106803719. The reversal of 81106803707 is 70730860118.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81106803707 - 2¹⁶ = 81106738171 is a prime.

It is not a weakly prime, because it can be changed into another prime (81106803727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40553401853 + 40553401854.

It is an arithmetic number, because the mean of its divisors is an integer number (40553401854).

Almost surely, 2^81106803707 is an apocalyptic number.

81106803707 is a deficient number, since it is larger than the sum of its proper divisors (1).

81106803707 is an equidigital number, since it uses as much as digits as its factorization.

81106803707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 81106803707 in words is "eighty-one billion, one hundred six million, eight hundred three thousand, seven hundred seven".