8256921792 has 168 divisors, whose sum is σ = 25467960240. Its totient is φ = 2354042880.

The previous prime is 8256921737. The next prime is 8256921797. The reversal of 8256921792 is 2971296528.

It is a tau number, because it is divible by the number of its divisors (168).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8256921797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7723434 + ... + 7724502.

Almost surely, 2^8256921792 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 8256921792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12733980120).

8256921792 is an abundant number, since it is smaller than the sum of its proper divisors (17211038448).

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

8256921792 is a wasteful number, since it uses less digits than its factorization.

8256921792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919 (or 1902 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 51.

The square root of 8256921792 is about 90867.6058449875. The cubic root of 8256921792 is about 2021.1849558350.

The spelling of 8256921792 in words is "eight billion, two hundred fifty-six million, nine hundred twenty-one thousand, seven hundred ninety-two".