82145820571 has 8 divisors (see below), whose sum is σ = 82454011344. Its totient is φ = 81838056960.

The previous prime is 82145820443. The next prime is 82145820583. The reversal of 82145820571 is 17502854128.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 82145820571 - 2⁷ = 82145820443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82145820271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281176 + ... + 493306.

It is an arithmetic number, because the mean of its divisors is an integer number (10306751418).

Almost surely, 2^82145820571 is an apocalyptic number.

82145820571 is a deficient number, since it is larger than the sum of its proper divisors (308190773).

82145820571 is a wasteful number, since it uses less digits than its factorization.

82145820571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213581.

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 82145820571 in words is "eighty-two billion, one hundred forty-five million, eight hundred twenty thousand, five hundred seventy-one".