8281961856 has 128 divisors (see below), whose sum is σ = 27935270400. Its totient is φ = 2366267904.

The previous prime is 8281961827. The next prime is 8281961861. The reversal of 8281961856 is 6581691828.

It is a happy number.

8281961856 is a `hidden beast` number, since 8 + 2 + 8 + 19 + 618 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-3 number, since 3×8281961856³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146980 + ... + 195363.

It is an arithmetic number, because the mean of its divisors is an integer number (218244300).

Almost surely, 2^8281961856 is an apocalyptic number.

It is an amenable number.

8281961856 is an abundant number, since it is smaller than the sum of its proper divisors (19653308544).

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

8281961856 is a wasteful number, since it uses less digits than its factorization.

8281961856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342373 (or 342355 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 54.

The square root of 8281961856 is about 91005.2847696220. The cubic root of 8281961856 is about 2023.2260524698.

The spelling of 8281961856 in words is "eight billion, two hundred eighty-one million, nine hundred sixty-one thousand, eight hundred fifty-six".