8120564250 has 128 divisors (see below), whose sum is σ = 21516917760. Its totient is φ = 2032819200.

The previous prime is 8120564239. The next prime is 8120564251. The reversal of 8120564250 is 524650218.

It is not an unprimeable number, because it can be changed into a prime (8120564251) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7815231 + ... + 7816269.

It is an arithmetic number, because the mean of its divisors is an integer number (168100920).

Almost surely, 2^8120564250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8120564250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10758458880).

8120564250 is an abundant number, since it is smaller than the sum of its proper divisors (13396353510).

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

8120564250 is a wasteful number, since it uses less digits than its factorization.

8120564250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1689 (or 1679 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 8120564250 is about 90114.1734135092. The cubic root of 8120564250 is about 2009.9969678923.

The spelling of 8120564250 in words is "eight billion, one hundred twenty million, five hundred sixty-four thousand, two hundred fifty".