80472640329 has 9 divisors (see below), whose sum is σ = 116239487533. Its totient is φ = 53647859532.

The previous prime is 80472640309. The next prime is 80472640351. The reversal of 80472640329 is 92304627408.

The square root of 80472640329 is 283677.

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

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 80472640329 - 2²¹ = 80470543177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (80472640309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 803752 + ... + 898310.

Almost surely, 2^80472640329 is an apocalyptic number.

80472640329 is the 283677-th square number.

80472640329 is the 141839-th centered octagonal number.

It is an amenable number.

80472640329 is a deficient number, since it is larger than the sum of its proper divisors (35766847204).

80472640329 is an frugal number, since it uses more digits than its factorization.

80472640329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189124 (or 94562 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 45.

It can be divided in two parts, 80472 and 640329, that added together give a square (720801 = 849²).

The spelling of 80472640329 in words is "eighty billion, four hundred seventy-two million, six hundred forty thousand, three hundred twenty-nine".