82171716500 has 24 divisors (see below), whose sum is σ = 179463029928. Its totient is φ = 32868686400.

The previous prime is 82171716491. The next prime is 82171716541. The reversal of 82171716500 is 561717128.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 331094416 + 81840622084 = 18196^2 + 286078^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82171217 + ... + 82172216.

It is an arithmetic number, because the mean of its divisors is an integer number (7477626247).

Almost surely, 2^82171716500 is an apocalyptic number.

It is an amenable number.

82171716500 is an abundant number, since it is smaller than the sum of its proper divisors (97291313428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82171716500 is a wasteful number, since it uses less digits than its factorization.

82171716500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164343452 (or 164343440 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 38.

The spelling of 82171716500 in words is "eighty-two billion, one hundred seventy-one million, seven hundred sixteen thousand, five hundred".