82171790046 has 12 divisors (see below), whose sum is σ = 178038878472. Its totient is φ = 27390596676.

The previous prime is 82171790033. The next prime is 82171790047. The reversal of 82171790046 is 64009717128.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 82171789983 and 82171790010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82171790047) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2282549706 + ... + 2282549741.

It is an arithmetic number, because the mean of its divisors is an integer number (14836573206).

Almost surely, 2^82171790046 is an apocalyptic number.

82171790046 is an abundant number, since it is smaller than the sum of its proper divisors (95867088426).

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

82171790046 is a wasteful number, since it uses less digits than its factorization.

82171790046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4565099455 (or 4565099452 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The spelling of 82171790046 in words is "eighty-two billion, one hundred seventy-one million, seven hundred ninety thousand, forty-six".