856499650560 has 896 divisors, whose sum is σ = 3156293524320. Its totient is φ = 222953472000.

The previous prime is 856499650549. The next prime is 856499650577. The reversal of 856499650560 is 65056994658.

856499650560 is a `hidden beast` number, since 8 + 5 + 6 + 4 + 9 + 9 + 65 + 0 + 560 = 666.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8480194510 + ... + 8480194610.

Almost surely, 2^856499650560 is an apocalyptic number.

856499650560 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856499650560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578146762160).

856499650560 is an abundant number, since it is smaller than the sum of its proper divisors (2299793873760).

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

856499650560 is an frugal number, since it uses more digits than its factorization.

856499650560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 69984000, while the sum is 63.

The spelling of 856499650560 in words is "eight hundred fifty-six billion, four hundred ninety-nine million, six hundred fifty thousand, five hundred sixty".