80822509849 has 3 divisors (see below), whose sum is σ = 80822794143. Its totient is φ = 80822225556.

The previous prime is 80822509771. The next prime is 80822509853. The reversal of 80822509849 is 94890522808.

The square root of 80822509849 is 284293.

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., 18288505225 + 62534004624 = 135235^2 + 250068^2 .

It is not a de Polignac number, because 80822509849 - 2⁷ = 80822509721 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 80822509849.

It is not an unprimeable number, because it can be changed into a prime (80822599849) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 142147 + ... + 426439.

It is an arithmetic number, because the mean of its divisors is an integer number (26940931381).

Almost surely, 2^80822509849 is an apocalyptic number.

80822509849 is the 284293-rd square number.

80822509849 is the 142147-th centered octagonal number.

It is an amenable number.

80822509849 is a deficient number, since it is larger than the sum of its proper divisors (284294).

80822509849 is an frugal number, since it uses more digits than its factorization.

80822509849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568586 (or 284293 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 55.

The spelling of 80822509849 in words is "eighty billion, eight hundred twenty-two million, five hundred nine thousand, eight hundred forty-nine".