82178222292 has 72 divisors (see below), whose sum is σ = 223553394792. Its totient is φ = 25358745600.

The previous prime is 82178222281. The next prime is 82178222317. The reversal of 82178222292 is 29222287128.

It can be written as a sum of positive squares in 4 ways, for example, as 13439556 + 82164782736 = 3666^2 + 286644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1063309 + ... + 1137972.

It is an arithmetic number, because the mean of its divisors is an integer number (3104908261).

Almost surely, 2^82178222292 is an apocalyptic number.

It is an amenable number.

82178222292 is an abundant number, since it is smaller than the sum of its proper divisors (141375172500).

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

82178222292 is a wasteful number, since it uses less digits than its factorization.

82178222292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201369 (or 2201364 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The spelling of 82178222292 in words is "eighty-two billion, one hundred seventy-eight million, two hundred twenty-two thousand, two hundred ninety-two".