82781745227 has 4 divisors (see below), whose sum is σ = 82994552160. Its totient is φ = 82568938296.

The previous prime is 82781745209. The next prime is 82781745229. The reversal of 82781745227 is 72254718728.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82781745227 - 2¹⁰ = 82781744203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82781745229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106402883 + ... + 106403660.

It is an arithmetic number, because the mean of its divisors is an integer number (20748638040).

Almost surely, 2^82781745227 is an apocalyptic number.

82781745227 is a deficient number, since it is larger than the sum of its proper divisors (212806933).

82781745227 is a wasteful number, since it uses less digits than its factorization.

82781745227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212806932.

The product of its digits is 3512320, while the sum is 53.

The spelling of 82781745227 in words is "eighty-two billion, seven hundred eighty-one million, seven hundred forty-five thousand, two hundred twenty-seven".