82170568 has 8 divisors (see below), whose sum is σ = 154069830. Its totient is φ = 41085280.

The previous prime is 82170551. The next prime is 82170577. The reversal of 82170568 is 86507128.

It can be written as a sum of positive squares in only one way, i.e., 71267364 + 10903204 = 8442^2 + 3302^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5135653 + ... + 5135668.

Almost surely, 2^82170568 is an apocalyptic number.

It is an amenable number.

82170568 is a deficient number, since it is larger than the sum of its proper divisors (71899262).

82170568 is a wasteful number, since it uses less digits than its factorization.

82170568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271327 (or 10271323 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 82170568 is about 9064.7982878826. The cubic root of 82170568 is about 434.7491714657.

The spelling of 82170568 in words is "eighty-two million, one hundred seventy thousand, five hundred sixty-eight".