82609731394 has 4 divisors (see below), whose sum is σ = 123914597094. Its totient is φ = 41304865696.

The previous prime is 82609731389. The next prime is 82609731397. The reversal of 82609731394 is 49313790628.

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

It can be written as a sum of positive squares in only one way, i.e., 80988622225 + 1621109169 = 284585^2 + 40263^2 .

It is not an unprimeable number, because it can be changed into a prime (82609731397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20652432847 + ... + 20652432850.

Almost surely, 2^82609731394 is an apocalyptic number.

82609731394 is a deficient number, since it is larger than the sum of its proper divisors (41304865700).

82609731394 is a wasteful number, since it uses less digits than its factorization.

82609731394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41304865699.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The spelling of 82609731394 in words is "eighty-two billion, six hundred nine million, seven hundred thirty-one thousand, three hundred ninety-four".