82856620386667 has 4 divisors (see below), whose sum is σ = 87217495143880. Its totient is φ = 78495745629456.

The previous prime is 82856620386637. The next prime is 82856620386691. The reversal of 82856620386667 is 76668302665828.

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 82856620386667 - 2⁴³ = 74060527364459 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 82856620386667.

It is not an unprimeable number, because it can be changed into a prime (82856620386637) 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, 2180437378578 + ... + 2180437378615.

It is an arithmetic number, because the mean of its divisors is an integer number (21804373785970).

Almost surely, 2^{82856620386667} is an apocalyptic number.

82856620386667 is a deficient number, since it is larger than the sum of its proper divisors (4360874757213).

82856620386667 is a wasteful number, since it uses less digits than its factorization.

82856620386667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360874757212.

The product of its (nonzero) digits is 1672151040, while the sum is 73.

The spelling of 82856620386667 in words is "eighty-two trillion, eight hundred fifty-six billion, six hundred twenty million, three hundred eighty-six thousand, six hundred sixty-seven".