82440549447 has 4 divisors (see below), whose sum is σ = 109920732600. Its totient is φ = 54960366296.

The previous prime is 82440549431. The next prime is 82440549467. The reversal of 82440549447 is 74494504428.

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

It is a cyclic number.

It is not a de Polignac number, because 82440549447 - 2⁴ = 82440549431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82440549447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82440549407) 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, 13740091572 + ... + 13740091577.

It is an arithmetic number, because the mean of its divisors is an integer number (27480183150).

Almost surely, 2^82440549447 is an apocalyptic number.

82440549447 is a deficient number, since it is larger than the sum of its proper divisors (27480183153).

82440549447 is a wasteful number, since it uses less digits than its factorization.

82440549447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27480183152.

The product of its (nonzero) digits is 5160960, while the sum is 51.

The spelling of 82440549447 in words is "eighty-two billion, four hundred forty million, five hundred forty-nine thousand, four hundred forty-seven".