81200846567 has 2 divisors, whose sum is σ = 81200846568. Its totient is φ = 81200846566.

The previous prime is 81200846563. The next prime is 81200846569. The reversal of 81200846567 is 76564800218.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81200846567 - 2² = 81200846563 is a prime.

Together with 81200846569, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81200846561) 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, 40600423283 + 40600423284.

It is an arithmetic number, because the mean of its divisors is an integer number (40600423284).

Almost surely, 2^81200846567 is an apocalyptic number.

81200846567 is a deficient number, since it is larger than the sum of its proper divisors (1).

81200846567 is an equidigital number, since it uses as much as digits as its factorization.

81200846567 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 81200846567 in words is "eighty-one billion, two hundred million, eight hundred forty-six thousand, five hundred sixty-seven".