856378750656 has 336 divisors, whose sum is σ = 2823310380800. Its totient is φ = 226937272320.

The previous prime is 856378750613. The next prime is 856378750673. The reversal of 856378750656 is 656057873658.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5663685 + ... + 5812923.

Almost surely, 2^856378750656 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 856378750656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411655190400).

856378750656 is an abundant number, since it is smaller than the sum of its proper divisors (1966931630144).

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

856378750656 is a wasteful number, since it uses less digits than its factorization.

856378750656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149308 (or 149287 counting only the distinct ones).

The product of its (nonzero) digits is 254016000, while the sum is 66.

The spelling of 856378750656 in words is "eight hundred fifty-six billion, three hundred seventy-eight million, seven hundred fifty thousand, six hundred fifty-six".