80565629 has 2 divisors, whose sum is σ = 80565630. Its totient is φ = 80565628.

The previous prime is 80565607. The next prime is 80565659. The reversal of 80565629 is 92656508.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45873529 + 34692100 = 6773^2 + 5890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80565629 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80565659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40282814 + 40282815.

It is an arithmetic number, because the mean of its divisors is an integer number (40282815).

Almost surely, 2^80565629 is an apocalyptic number.

It is an amenable number.

80565629 is a deficient number, since it is larger than the sum of its proper divisors (1).

80565629 is an equidigital number, since it uses as much as digits as its factorization.

80565629 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 80565629 is about 8975.8358385167. The cubic root of 80565629 is about 431.9000629739.

The spelling of 80565629 in words is "eighty million, five hundred sixty-five thousand, six hundred twenty-nine".