82180299347 has 4 divisors (see below), whose sum is σ = 86505578280. Its totient is φ = 77855020416.

The previous prime is 82180299269. The next prime is 82180299391. The reversal of 82180299347 is 74399208128.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82180299347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82180290347) 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, 2162639438 + ... + 2162639475.

It is an arithmetic number, because the mean of its divisors is an integer number (21626394570).

Almost surely, 2^82180299347 is an apocalyptic number.

82180299347 is a deficient number, since it is larger than the sum of its proper divisors (4325278933).

82180299347 is a wasteful number, since it uses less digits than its factorization.

82180299347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4325278932.

The product of its (nonzero) digits is 1741824, while the sum is 53.

The spelling of 82180299347 in words is "eighty-two billion, one hundred eighty million, two hundred ninety-nine thousand, three hundred forty-seven".