856556496 has 120 divisors (see below), whose sum is σ = 2448950400. Its totient is φ = 279417600.

The previous prime is 856556419. The next prime is 856556497. The reversal of 856556496 is 694655658.

856556496 is a `hidden beast` number, since 85 + 6 + 556 + 4 + 9 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856556497) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2034366 + ... + 2034786.

It is an arithmetic number, because the mean of its divisors is an integer number (20407920).

Almost surely, 2^856556496 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 856556496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1224475200).

856556496 is an abundant number, since it is smaller than the sum of its proper divisors (1592393904).

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

856556496 is a wasteful number, since it uses less digits than its factorization.

856556496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705 (or 696 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 54.

The square root of 856556496 is about 29266.9864523152. The cubic root of 856556496 is about 949.6975938677.

The spelling of 856556496 in words is "eight hundred fifty-six million, five hundred fifty-six thousand, four hundred ninety-six".