82171017487 has 8 divisors (see below), whose sum is σ = 90374671296. Its totient is φ = 74236336032.

The previous prime is 82171017479. The next prime is 82171017491. The reversal of 82171017487 is 78471017128.

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 82171017487 - 2³ = 82171017479 is a prime.

It is a super-2 number, since 2×82171017487² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82171017457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67242448 + ... + 67243669.

It is an arithmetic number, because the mean of its divisors is an integer number (11296833912).

Almost surely, 2^82171017487 is an apocalyptic number.

82171017487 is a deficient number, since it is larger than the sum of its proper divisors (8203653809).

82171017487 is a wasteful number, since it uses less digits than its factorization.

82171017487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134486177.

The product of its (nonzero) digits is 175616, while the sum is 46.

The spelling of 82171017487 in words is "eighty-two billion, one hundred seventy-one million, seventeen thousand, four hundred eighty-seven".