82042261109 has 4 divisors (see below), whose sum is σ = 82092874860. Its totient is φ = 81991647360.

The previous prime is 82042261051. The next prime is 82042261129. The reversal of 82042261109 is 90116224028.

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 48810064900 + 33232196209 = 220930^2 + 182297^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82042261109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82042261129) 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, 25304444 + ... + 25307685.

It is an arithmetic number, because the mean of its divisors is an integer number (20523218715).

Almost surely, 2^82042261109 is an apocalyptic number.

It is an amenable number.

82042261109 is a deficient number, since it is larger than the sum of its proper divisors (50613751).

82042261109 is a wasteful number, since it uses less digits than its factorization.

82042261109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50613750.

The product of its (nonzero) digits is 13824, while the sum is 35.

The spelling of 82042261109 in words is "eighty-two billion, forty-two million, two hundred sixty-one thousand, one hundred nine".