81178222622 has 32 divisors (see below), whose sum is σ = 150483806208. Its totient is φ = 32047468416.

The previous prime is 81178222607. The next prime is 81178222667. The reversal of 81178222622 is 22622287118.

It is a self number, because there is not a number n which added to its sum of digits gives 81178222622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3617378 + ... + 3639749.

It is an arithmetic number, because the mean of its divisors is an integer number (4702618944).

Almost surely, 2^81178222622 is an apocalyptic number.

81178222622 is a deficient number, since it is larger than the sum of its proper divisors (69305583586).

81178222622 is a wasteful number, since it uses less digits than its factorization.

81178222622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7257200.

The product of its digits is 86016, while the sum is 41.

The spelling of 81178222622 in words is "eighty-one billion, one hundred seventy-eight million, two hundred twenty-two thousand, six hundred twenty-two".