8125553566 has 64 divisors (see below), whose sum is σ = 14223686400. Its totient is φ = 3449246976.

The previous prime is 8125553549. The next prime is 8125553621. The reversal of 8125553566 is 6653555218.

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 31 ways as a sum of consecutive naturals, for example, 3801250 + ... + 3803386.

It is an arithmetic number, because the mean of its divisors is an integer number (222245100).

Almost surely, 2^8125553566 is an apocalyptic number.

8125553566 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

8125553566 is a deficient number, since it is larger than the sum of its proper divisors (6098132834).

8125553566 is a wasteful number, since it uses less digits than its factorization.

8125553566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2393.

The product of its digits is 1080000, while the sum is 46.

The square root of 8125553566 is about 90141.8524659883. The cubic root of 8125553566 is about 2010.4085344028.

The spelling of 8125553566 in words is "eight billion, one hundred twenty-five million, five hundred fifty-three thousand, five hundred sixty-six".