82704042720447 has 16 divisors (see below), whose sum is σ = 110290984549728. Its totient is φ = 55126565245440.

The previous prime is 82704042720443. The next prime is 82704042720589. The reversal of 82704042720447 is 74402724040728.

It is not a de Polignac number, because 82704042720447 - 2² = 82704042720443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82704042720447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82704042720443) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 903695163 + ... + 903786675.

It is an arithmetic number, because the mean of its divisors is an integer number (6893186534358).

Almost surely, 2^{82704042720447} is an apocalyptic number.

82704042720447 is a deficient number, since it is larger than the sum of its proper divisors (27586941829281).

82704042720447 is a wasteful number, since it uses less digits than its factorization.

82704042720447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139930.

The product of its (nonzero) digits is 5619712, while the sum is 51.

The spelling of 82704042720447 in words is "eighty-two trillion, seven hundred four billion, forty-two million, seven hundred twenty thousand, four hundred forty-seven".