8122729556 has 12 divisors (see below), whose sum is σ = 14352784992. Its totient is φ = 4021933848.

The previous prime is 8122729543. The next prime is 8122729603. The reversal of 8122729556 is 6559272218.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8122729556.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9857270 + ... + 9858093.

It is an arithmetic number, because the mean of its divisors is an integer number (1196065416).

Almost surely, 2^8122729556 is an apocalyptic number.

It is an amenable number.

8122729556 is a deficient number, since it is larger than the sum of its proper divisors (6230055436).

8122729556 is a wasteful number, since it uses less digits than its factorization.

8122729556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19715470 (or 19715468 counting only the distinct ones).

The product of its digits is 604800, while the sum is 47.

The square root of 8122729556 is about 90126.1868493281. The cubic root of 8122729556 is about 2010.1756037433.

The spelling of 8122729556 in words is "eight billion, one hundred twenty-two million, seven hundred twenty-nine thousand, five hundred fifty-six".