80529929979409 has 27 divisors (see below), whose sum is σ = 84493242497937. Its totient is φ = 76749221316768.

The previous prime is 80529929979391. The next prime is 80529929979481. The reversal of 80529929979409 is 90497992992508.

The square root of 80529929979409 is 8973847.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 9918310942225 + 70611619037184 = 3149335^2 + 8403072^2 .

It is not a de Polignac number, because 80529929979409 - 2¹¹ = 80529929977361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80529929979209) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 20559081519 + ... + 20559085435.

Almost surely, 2^{80529929979409} is an apocalyptic number.

80529929979409 is the 8973847-th square number.

80529929979409 is the 4486924-th centered octagonal number.

It is an amenable number.

80529929979409 is a deficient number, since it is larger than the sum of its proper divisors (3963312518528).

80529929979409 is an frugal number, since it uses more digits than its factorization.

80529929979409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8050 (or 4025 counting only the distinct ones).

The product of its (nonzero) digits is 2380855680, while the sum is 82.

The spelling of 80529929979409 in words is "eighty trillion, five hundred twenty-nine billion, nine hundred twenty-nine million, nine hundred seventy-nine thousand, four hundred nine".