80391469244641 has 3 divisors (see below), whose sum is σ = 80391478210771. Its totient is φ = 80391460278512.

The previous prime is 80391469244599. The next prime is 80391469244711. The reversal of 80391469244641 is 14644296419308.

The square root of 80391469244641 is 8966129.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 41697097814241 + 38694371430400 = 6457329^2 + 6220480^2 .

It is not a de Polignac number, because 80391469244641 - 2²³ = 80391460856033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80391469244641.

It is not an unprimeable number, because it can be changed into a prime (80391469244341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4483065 + ... + 13449193.

Almost surely, 2^{80391469244641} is an apocalyptic number.

80391469244641 is the 8966129-th square number.

80391469244641 is the 4483065-th centered octagonal number.

It is an amenable number.

80391469244641 is a deficient number, since it is larger than the sum of its proper divisors (8966130).

80391469244641 is an frugal number, since it uses more digits than its factorization.

80391469244641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17932258 (or 8966129 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 61.

The spelling of 80391469244641 in words is "eighty trillion, three hundred ninety-one billion, four hundred sixty-nine million, two hundred forty-four thousand, six hundred forty-one".