8106121156 has 81 divisors (see below), whose sum is σ = 16941592269. Its totient is φ = 3383837856.

The previous prime is 8106121139. The next prime is 8106121171. The reversal of 8106121156 is 6511216018.

The square root of 8106121156 is 90034.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5649927556 + 2456193600 = 75166^2 + 49560^2 .

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 26 ways as a sum of consecutive naturals, for example, 74368030 + ... + 74368138.

Almost surely, 2^8106121156 is an apocalyptic number.

8106121156 is the 90034-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8106121156

8106121156 is an abundant number, since it is smaller than the sum of its proper divisors (8835471113).

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

8106121156 is a wasteful number, since it uses less digits than its factorization.

8106121156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 177 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 31.

The cubic root of 8106121156 is about 2008.8046121901.

The spelling of 8106121156 in words is "eight billion, one hundred six million, one hundred twenty-one thousand, one hundred fifty-six".