82718668021 has 8 divisors (see below), whose sum is σ = 94161962304. Its totient is φ = 71929276320.

The previous prime is 82718668007. The next prime is 82718668037. The reversal of 82718668021 is 12086681728.

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

It is not a de Polignac number, because 82718668021 - 2²⁷ = 82584450293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82718668001) 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, 163475376 + ... + 163475881.

It is an arithmetic number, because the mean of its divisors is an integer number (11770245288).

Almost surely, 2^82718668021 is an apocalyptic number.

It is an amenable number.

82718668021 is a deficient number, since it is larger than the sum of its proper divisors (11443294283).

82718668021 is a wasteful number, since it uses less digits than its factorization.

82718668021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326951291.

The product of its (nonzero) digits is 516096, while the sum is 49.

The spelling of 82718668021 in words is "eighty-two billion, seven hundred eighteen million, six hundred sixty-eight thousand, twenty-one".