80181284569 has 3 divisors (see below), whose sum is σ = 80181567733. Its totient is φ = 80181001406.

The previous prime is 80181284537. The next prime is 80181284627. The reversal of 80181284569 is 96548218108.

It is a happy number.

The square root of 80181284569 is 283163.

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 is not a de Polignac number, because 80181284569 - 2⁵ = 80181284537 is a prime.

It is a super-2 number, since 2×80181284569² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80181284069) 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, 141582 + ... + 424744.

Almost surely, 2^80181284569 is an apocalyptic number.

80181284569 is the 283163-rd square number.

80181284569 is the 141582-nd centered octagonal number.

It is an amenable number.

80181284569 is a deficient number, since it is larger than the sum of its proper divisors (283164).

80181284569 is an frugal number, since it uses more digits than its factorization.

80181284569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566326 (or 283163 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 52.

The spelling of 80181284569 in words is "eighty billion, one hundred eighty-one million, two hundred eighty-four thousand, five hundred sixty-nine".