8123755556 has 12 divisors (see below), whose sum is σ = 16247511168. Its totient is φ = 3481609512.

The previous prime is 8123755553. The next prime is 8123755589. The reversal of 8123755556 is 6555573218.

It is a happy number.

8123755556 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 8123755556.

It is not an unprimeable number, because it can be changed into a prime (8123755553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145067036 + ... + 145067091.

It is an arithmetic number, because the mean of its divisors is an integer number (1353959264).

Almost surely, 2^8123755556 is an apocalyptic number.

It is an amenable number.

8123755556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

8123755556 is a wasteful number, since it uses less digits than its factorization.

8123755556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290134138 (or 290134136 counting only the distinct ones).

The product of its digits is 1260000, while the sum is 47.

The square root of 8123755556 is about 90131.8786889522. The cubic root of 8123755556 is about 2010.2602367608.

The spelling of 8123755556 in words is "eight billion, one hundred twenty-three million, seven hundred fifty-five thousand, five hundred fifty-six".