81996035167 has 2 divisors, whose sum is σ = 81996035168. Its totient is φ = 81996035166.

The previous prime is 81996035153. The next prime is 81996035249. The reversal of 81996035167 is 76153069918.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-81996035167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81996035267) 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, 40998017583 + 40998017584.

It is an arithmetic number, because the mean of its divisors is an integer number (40998017584).

Almost surely, 2^81996035167 is an apocalyptic number.

81996035167 is a deficient number, since it is larger than the sum of its proper divisors (1).

81996035167 is an equidigital number, since it uses as much as digits as its factorization.

81996035167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 81996035167 in words is "eighty-one billion, nine hundred ninety-six million, thirty-five thousand, one hundred sixty-seven".