81952553167 has 2 divisors, whose sum is σ = 81952553168. Its totient is φ = 81952553166.

The previous prime is 81952553159. The next prime is 81952553171. The reversal of 81952553167 is 76135525918.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81952553167 - 2³ = 81952553159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81955553167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40976276583 + 40976276584.

It is an arithmetic number, because the mean of its divisors is an integer number (40976276584).

Almost surely, 2^81952553167 is an apocalyptic number.

81952553167 is a deficient number, since it is larger than the sum of its proper divisors (1).

81952553167 is an equidigital number, since it uses as much as digits as its factorization.

81952553167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2268000, while the sum is 52.

The spelling of 81952553167 in words is "eighty-one billion, nine hundred fifty-two million, five hundred fifty-three thousand, one hundred sixty-seven".