165812084729 has 2 divisors, whose sum is σ = 165812084730. Its totient is φ = 165812084728.

The previous prime is 165812084723. The next prime is 165812084773. The reversal of 165812084729 is 927480218561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 164604661225 + 1207423504 = 405715^2 + 34748^2 .

It is a cyclic number.

It is not a de Polignac number, because 165812084729 - 2¹² = 165812080633 is a prime.

It is not a weakly prime, because it can be changed into another prime (165812084723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82906042364 + 82906042365.

It is an arithmetic number, because the mean of its divisors is an integer number (82906042365).

Almost surely, 2^165812084729 is an apocalyptic number.

It is an amenable number.

165812084729 is a deficient number, since it is larger than the sum of its proper divisors (1).

165812084729 is an equidigital number, since it uses as much as digits as its factorization.

165812084729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 165812084729 in words is "one hundred sixty-five billion, eight hundred twelve million, eighty-four thousand, seven hundred twenty-nine".