8256971550 has 96 divisors (see below), whose sum is σ = 22081086720. Its totient is φ = 2035065600.

The previous prime is 8256971501. The next prime is 8256971557. The reversal of 8256971550 is 551796528.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8256971550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8256971557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 81519 + ... + 152181.

It is an arithmetic number, because the mean of its divisors is an integer number (230011320).

Almost surely, 2^8256971550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8256971550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11040543360).

8256971550 is an abundant number, since it is smaller than the sum of its proper divisors (13824115170).

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

8256971550 is a wasteful number, since it uses less digits than its factorization.

8256971550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70738 (or 70733 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 48.

The square root of 8256971550 is about 90867.8796385169. The cubic root of 8256971550 is about 2021.1890158597.

The spelling of 8256971550 in words is "eight billion, two hundred fifty-six million, nine hundred seventy-one thousand, five hundred fifty".