81015450167 has 2 divisors, whose sum is σ = 81015450168. Its totient is φ = 81015450166.

The previous prime is 81015450161. The next prime is 81015450179. The reversal of 81015450167 is 76105451018.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 81015450167 - 2¹⁰ = 81015449143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 81015450167.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81015450161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40507725083 + 40507725084.

It is an arithmetic number, because the mean of its divisors is an integer number (40507725084).

Almost surely, 2^81015450167 is an apocalyptic number.

81015450167 is a deficient number, since it is larger than the sum of its proper divisors (1).

81015450167 is an equidigital number, since it uses as much as digits as its factorization.

81015450167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 81015450167 in words is "eighty-one billion, fifteen million, four hundred fifty thousand, one hundred sixty-seven".