820782147841 has 4 divisors (see below), whose sum is σ = 842965449172. Its totient is φ = 798598846512.

The previous prime is 820782147833. The next prime is 820782147853. The reversal of 820782147841 is 148741287028.

820782147841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 521398082241 + 299384065600 = 722079^2 + 547160^2 .

It is a cyclic number.

It is not a de Polignac number, because 820782147841 - 2³ = 820782147833 is a prime.

It is a super-2 number, since 2×820782147841² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820782147641) 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, 11091650610 + ... + 11091650683.

It is an arithmetic number, because the mean of its divisors is an integer number (210741362293).

Almost surely, 2^820782147841 is an apocalyptic number.

It is an amenable number.

820782147841 is a deficient number, since it is larger than the sum of its proper divisors (22183301331).

820782147841 is a wasteful number, since it uses less digits than its factorization.

820782147841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183301330.

The product of its (nonzero) digits is 1605632, while the sum is 52.

The spelling of 820782147841 in words is "eight hundred twenty billion, seven hundred eighty-two million, one hundred forty-seven thousand, eight hundred forty-one".