80620891529 has 2 divisors, whose sum is σ = 80620891530. Its totient is φ = 80620891528.

The previous prime is 80620891517. The next prime is 80620891553. The reversal of 80620891529 is 92519802608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77979445504 + 2641446025 = 279248^2 + 51395^2 .

It is a cyclic number.

It is not a de Polignac number, because 80620891529 - 2⁴ = 80620891513 is a prime.

It is not a weakly prime, because it can be changed into another prime (80620891829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40310445764 + 40310445765.

It is an arithmetic number, because the mean of its divisors is an integer number (40310445765).

Almost surely, 2^80620891529 is an apocalyptic number.

It is an amenable number.

80620891529 is a deficient number, since it is larger than the sum of its proper divisors (1).

80620891529 is an equidigital number, since it uses as much as digits as its factorization.

80620891529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 50.

The spelling of 80620891529 in words is "eighty billion, six hundred twenty million, eight hundred ninety-one thousand, five hundred twenty-nine".