8250721752 has 128 divisors (see below), whose sum is σ = 25437404160. Its totient is φ = 2171681280.

The previous prime is 8250721711. The next prime is 8250721753. The reversal of 8250721752 is 2571270528.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 8250721752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8250721753) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1178053 + ... + 1185035.

It is an arithmetic number, because the mean of its divisors is an integer number (198729720).

Almost surely, 2^8250721752 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8250721752, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12718702080).

8250721752 is an abundant number, since it is smaller than the sum of its proper divisors (17186682408).

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

8250721752 is a wasteful number, since it uses less digits than its factorization.

8250721752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7553 (or 7549 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 8250721752 is about 90833.4836500285. The cubic root of 8250721752 is about 2020.6789333013.

The spelling of 8250721752 in words is "eight billion, two hundred fifty million, seven hundred twenty-one thousand, seven hundred fifty-two".