8250721768 has 8 divisors (see below), whose sum is σ = 15470103330. Its totient is φ = 4125360880.

The previous prime is 8250721757. The next prime is 8250721769. The reversal of 8250721768 is 8671270528.

It can be written as a sum of positive squares in only one way, i.e., 8140009284 + 110712484 = 90222^2 + 10522^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (8250721769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515670103 + ... + 515670118.

Almost surely, 2^8250721768 is an apocalyptic number.

It is an amenable number.

8250721768 is a deficient number, since it is larger than the sum of its proper divisors (7219381562).

8250721768 is a wasteful number, since it uses less digits than its factorization.

8250721768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031340227 (or 1031340223 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 46.

The square root of 8250721768 is about 90833.4837381018. The cubic root of 8250721768 is about 2020.6789346074.

The spelling of 8250721768 in words is "eight billion, two hundred fifty million, seven hundred twenty-one thousand, seven hundred sixty-eight".