82154682361 has 4 divisors (see below), whose sum is σ = 82629565092. Its totient is φ = 81679799632.

The previous prime is 82154682359. The next prime is 82154682367. The reversal of 82154682361 is 16328645128.

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 79400531961 + 2754150400 = 281781^2 + 52480^2 .

It is a cyclic number.

It is not a de Polignac number, because 82154682361 - 2¹ = 82154682359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82154682367) 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, 237441106 + ... + 237441451.

It is an arithmetic number, because the mean of its divisors is an integer number (20657391273).

Almost surely, 2^82154682361 is an apocalyptic number.

It is an amenable number.

82154682361 is a deficient number, since it is larger than the sum of its proper divisors (474882731).

82154682361 is a wasteful number, since it uses less digits than its factorization.

82154682361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474882730.

The product of its digits is 552960, while the sum is 46.

The spelling of 82154682361 in words is "eighty-two billion, one hundred fifty-four million, six hundred eighty-two thousand, three hundred sixty-one".